Cell-Tower “Mapping” and Autonomous Surveillance Foundations: When Location-Tracking Summaries Are Lay Testimony and Timestamped Video Is Self-Authenticating Under OCGA § 24-9-923(c)

I. Introduction

In SHELLS v. THE STATE (S25A1372) and LESLIE v. THE STATE (S26A0138), the Supreme Court of Georgia reviewed two consolidated appeals arising from a joint jury trial in Troup County. Lewis Shells and Marcus Leslie were convicted of felony murder and numerous related offenses stemming from two armed robberies on November 26, 2016, the second of which culminated in the shooting death of Darius Tucker.

The prosecution’s theory was that Shells acted as a “set-up” participant—supplying a firearm and directing co-indictees to targets he knew held cash—while Leslie participated as one of the masked gunmen. Two co-indictees, Lee Fair and Jarvis Duncan, pled guilty and testified for the State. The appeals presented two distinct clusters of issues:

  • Shells: whether the evidence was constitutionally sufficient, including sufficiency to prove (i) shared criminal intent as a party to the crimes and (ii) causation of Tucker’s death.
  • Leslie: due process/right-to-be-present at arraignment; late-disclosed jail calls; foundation/authentication for surveillance videos/photos; sequestration of two lead-investigator witnesses; whether cell-phone location testimony required expert qualification; and multiple claims of ineffective assistance of counsel (plus cumulative error).

II. Summary of the Opinion

The Court affirmed all convictions. It held:

  • Shells: The evidence—especially testimony that “everybody” understood the robbery plan, Shells’s provision of a TEC-9, his leading the group to two cash-rich targets, and his post-shooting “hit the highway and drive safe” response—supported a finding of shared criminal intent and party-to-a-crime liability. Causation of death may be proven circumstantially; the medical examiner’s testimony describing a bullet passing through Tucker’s chest and heart, combined with the immediate collapse and death, supported causation beyond a reasonable doubt.
  • Leslie: No due process violation occurred because Leslie acquiesced to counsel’s waiver of formal arraignment after being informed, signing the indictment, and proceeding without further objection. Admission of late-produced jail calls was within the trial court’s discretion absent bad faith. Autonomous-camera surveillance videos/photos were properly admitted under OCGA § 24-9-923(c). Exempting two lead detectives from sequestration was not a manifest abuse of discretion. Cell-phone “mapping” testimony was permissible as lay testimony where it functioned as an organizational presentation of already-admitted records rather than an explanation of scientific methodology. Ineffective-assistance claims failed for lack of proof of deficiency and/or prejudice, and cumulative error did not warrant relief.

III. Analysis

A. Precedents Cited

1. Sufficiency review and party-to-a-crime intent

  • Dougherty v. State, 321 Ga. 577, 581 (2025), applying Jackson v. Virginia, 443 US 307, 319 (1979): the Court reaffirmed the controlling sufficiency framework—view evidence in the light most favorable to the verdict and ask whether a rational trier of fact could find guilt beyond a reasonable doubt.
  • Muse v. State, 316 Ga. 639, 647 (2023): credibility determinations, evidentiary weight, and reasonable inferences remain the jury’s province.
  • Holloway v. State, 320 Ga. 653, 655 (2025), and Scoggins v. State, 317 Ga. 832, 836 (2023), with OCGA § 16-2-20: “common criminal intent” for party liability can be inferred from presence, companionship, and conduct before/during/after the crime.
  • Grant v. State, 319 Ga. 490, 493 (2024): knowledge of a victim’s cash (e.g., gambling winnings) and communications with perpetrators can support inference of shared intent.

These cases supplied the doctrinal backbone for rejecting Shells’s argument that the State needed an explicit “magic words” admission that he knew the plan was robbery. The Court treated intent as a classic inference problem, not a direct-evidence requirement.

2. Homicide causation proof

  • Sorrells v. State, 267 Ga. 236, 238 (1996), and Shields v. State, 285 Ga. 372, 374 (2009): cause of death in homicide cases may be proven by circumstantial evidence.
  • Taylor v. State, 303 Ga. 624, 627 (2018), and Robinson v. State, 298 Ga. 455, 458 (2016): proximate cause of death is a jury question.
  • Sinkfield v. State, 318 Ga. 531, 538 (2024): on appeal, sufficiency on causation is assessed in the verdict’s favor; medical records and examiner testimony can sustain causation findings.

The Court used these precedents to neutralize Shells’s attempt to reframe causation as requiring an explicit expert conclusion identifying which wound was “the” fatal wound. The jury could infer causation from the described trajectory through the heart and the immediate medical sequence.

3. Presence at arraignment and “acquiescence” waiver

  • Brewner v. State, 302 Ga. 6, 12 (2017): identifies pathways to waive the right to be present, including subsequent acquiescence.
  • Champ v. State, 310 Ga. 832, 841 (2021): acquiescence may arise from silence after awareness of proceedings in one’s absence, provided the defendant has sufficient information for silence to be construed as consent; factual findings reviewed for clear error.

These authorities drove the Court’s conclusion that—even assuming no initial waiver—Leslie’s on-the-record awareness that counsel waived formal arraignment, his opportunity to consult counsel, his signature on the indictment, and his decision to proceed without further objection constituted acquiescence.

4. Discovery violations and exclusion as a “harsh sanction”

  • OCGA § 17-16-4(a)(1) (custodial statements) and OCGA § 17-16-6 (remedies; exclusion only upon showing of prejudice and bad faith).
  • Jester v. State, __ Ga. __, __ (2025): exclusion is not required and is “particularly harsh,” reserved for bad faith plus prejudice.

The Court treated the late disclosure of jail calls primarily as a remedial-discretion issue under OCGA § 17-16-6: without a developed claim of bad faith in the trial record and where the State articulated a relevance-triggered reason for late use, exclusion was not compelled.

5. Authentication of autonomous surveillance images

  • OCGA § 24-9-923(c): permits admission of photos/video/audio produced when the device is not operated by an individual person, if reliability is shown and the date/time stamp is contemporaneous with events depicted.
  • OCGA § 24-9-901(a): general authentication standard—evidence sufficient to support a finding that the item is what it is claimed to be.
  • Mitchell v. State, 320 Ga. 673, 676-677 (2025): recognizes OCGA § 24-9-923(c) as applicable to “video recordings from autonomous cameras,” and reviews authentication rulings for abuse of discretion.

The Court clarified a practical point often litigated: when the State proceeds under OCGA § 24-9-923(c), the statute does not require showing witness “unavailability” (a requirement associated with other portions of § 24-9-923). The key is competent evidence of reliability and contemporaneous timestamping, which the investigating detective supplied.

6. Sequestration of witnesses

  • OCGA § 24-6-615: sequestration is available but does not authorize exclusion of a person shown to be essential to the presentation of a party’s cause.
  • Williams v. State, 277 Ga. 853, 857 (2004): sequestration administration is reviewed for manifest abuse of discretion.
  • Holloman v. State, 291 Ga. 338, 340 (2012): no abuse where prosecutor shows a witness is needed for orderly presentation of evidence.
  • Miller v. State, 359 Ga. App. 380, 388-89 (2021): approving exemption of multiple witnesses from sequestration in appropriate circumstances.

The Court’s analysis emphasized case-management deference: two lead investigators for two separate crime scenes may be “essential” where the State articulates the organizational need.

7. Lay vs. expert testimony (cell-phone location mapping)

  • OCGA § 24-7-701 (lay opinion) and OCGA § 24-7-702 (expert testimony).
  • Bullard v. State, 307 Ga. 482, 492 (2019): lay witnesses may draw on professional experiences without necessarily becoming expert witnesses.
  • Moody v. State, 316 Ga. 490, 531 (2023): experience-based assessments can be admissible as lay testimony under Rule 701.
  • Pritchett v. State, 314 Ga. 767, 781-84 (2022): investigator’s experience-based inferences admitted as lay evidence.
  • Nundra v. State, 316 Ga. 1, 14-16 (2023): illustrates the Court’s sensitivity to the boundary between accepted methodology and the need (or not) for additional expert foundations, especially under plain-error review.

This portion of the opinion is consequential for modern prosecutions: the Court accepted the trial court’s characterization that plotting tower locations from admitted call-detail records and generating maps (even with software) can be “organizational” rather than “scientific,” and thus admissible through a non-tendered witness as lay testimony—at least on the record presented, where the witness did not purport to explain radiofrequency science and the defense did not meaningfully develop the objection (e.g., no voir dire despite invitation; no contemporaneous objection when reports were admitted).

8. Ineffective assistance of counsel; speculation and proof burdens

  • Strickland v. Washington, 466 US 668, 687 (1984): deficiency and prejudice required.
  • Bacon v. State, 316 Ga. 234, 239 (2023): objective unreasonableness measured against prevailing norms.
  • Bates v. State, 313 Ga. 57, 62 (2022), and Washington v. State, 313 Ga. 771, 773 (2022): reasonable probability standard; failure on one prong ends the claim.
  • Payne v. State, 314 Ga. 322, 334 (2022) (quoting Gittens v. State, 307 Ga. 841, 844 (2020)): speculation about unperformed investigation or unnamed witnesses cannot establish deficiency or prejudice.
  • Lee v. State, 318 Ga. 412, 421 (2024): reinforces requirement of concrete proffers to prove prejudice.
  • Green v. State, 302 Ga. 816, 819 (2018); Smith v. State, 307 Ga. 106, 119-120 (2019); Butler v. State, 290 Ga. 412, 413 (2012); Lupoe v. State, 300 Ga. 233, 242 (2016): severance is strategic; requires showing motion likely would have succeeded; joint trials proper where common scheme/plan exists and defenses are not truly antagonistic.
  • Keller v. State, 308 Ga. 492, 496 (2020); Biggs v. State, 281 Ga. 627, 632 (2007); McCulley v. State, 275 Ga. 473, 475-76 (2002): even where an underlying error might be “structural” in direct-review posture, prejudice is not presumed for ineffective-assistance claims; waiver of arraignment only matters if defendant was unaware of charges; acquiescence undermines prejudice.
  • Jackson v. State, 318 Ga. 393, 410 (2024): witness-selection decisions are strategic unless no competent attorney would do likewise.

9. Cumulative prejudice

  • Robinson v. State, 921 SE2d 319, 331 (2025): cumulative-prejudice analysis requires showing combined effect likely changed the outcome.

B. Legal Reasoning

1. Shells: proving party liability without explicit admissions

Shells’s sufficiency challenge was framed as an evidentiary “gap”: co-indictees did not directly testify that Shells knew the purpose was robbery. The Court treated that as a misunderstanding of intent proof. Under Jackson v. Virginia review, the jury can infer common intent from:

  • advance planning to “hit” houses for money/drugs (Fair’s testimony);
  • Shells’s provision of a TEC-9 pistol;
  • Shells selecting and leading the group to two targets known to have cash (poker winnings; drug dealers carrying cash);
  • Shells re-engaging after the first robbery by leading them to a second location;
  • his reaction after learning shots were fired: “hit the highway and drive safe.”

The Court’s reasoning reflects a practical rule: a “facilitator” who supplies instrumentalities and target information, and repeatedly guides perpetrators to targets, may be found to share the criminal intent even if he does not personally enter the homes.

2. Shells: causation of Tucker’s death without pinpointing “the” fatal wound

Shells’s causation argument relied on the medical examiner’s failure to explicitly label a wound “fatal.” The Court rejected any requirement of talismanic expert phrasing. It emphasized:

  • circumstantial proof is sufficient for cause of death;
  • the jury decides proximate cause;
  • the evidence showed Tucker was shot, became unresponsive, and died after EMS efforts;
  • the medical examiner described a bullet path through the chest and heart as “most grievous.”

Thus, in homicide sufficiency disputes, the Court reaffirmed that the combination of injury mechanics and temporal sequence can satisfy causation beyond a reasonable doubt, even absent a neatly packaged expert conclusion.

3. Leslie: arraignment in absentia cured by informed acquiescence

The Court assumed arguendo that Leslie neither waived presence nor authorized counsel to do so initially, then focused on Brewner v. State’s fourth waiver pathway: subsequent acquiescence. The decisive facts were:

  • Leslie raised that he had not been brought before a judge;
  • the trial court stated it understood formal arraignment had been waived;
  • Leslie consulted counsel and then, in his presence, counsel confirmed Leslie had reviewed the indictment, “joined issue,” and was ready for trial;
  • Leslie signed the indictment on the day trial began;
  • he proceeded without further objection.

Under Champ v. State, silence after awareness can equal consent if the defendant has enough information. The Court treated the signature and the on-the-record discussion as sufficient information and consent-by-acquiescence.

4. Leslie: late-disclosed jail calls and the centrality of “bad faith” under OCGA § 17-16-6

Even “pretermitting” whether OCGA § 17-16-4(a)(1) required earlier production, the Court centered its analysis on the remedy statute: exclusion requires prejudice and bad faith. The trial court’s finding of no bad faith was supported by:

  • defense counsel did not argue bad faith below;
  • the State articulated a relevance-based reason (opening statement raised the “Mod” nickname dispute);
  • the calls were used narrowly to show the nickname linkage.

The Court’s application of Jester v. State reinforces that exclusion is exceptional; absent a developed bad-faith record, trial courts retain broad discretion to cure with production and time to review.

5. Leslie: authentication of surveillance under OCGA § 24-9-923(c)

Leslie argued the State should have called a business employee to authenticate footage. The Court held the trial court properly admitted the materials under OCGA § 24-9-923(c), which applies to autonomous systems and contains its own reliability/timestamp conditions. The detective’s testimony that he verified the systems’ accuracy and timestamps constituted “competent evidence” supporting reliability.

This reasoning is a concrete, litigation-guiding clarification: when the proponent satisfies § 24-9-923(c), the absence of a store employee is not a foundational defect.

6. Leslie: sequestration exemptions for essential lead investigators

The Court deferred to the trial court’s management of OCGA § 24-6-615. The State explained why two detectives—each leading a separate incident investigation with many witnesses and exhibits—were needed for orderly presentation. Under Williams v. State and Holloman v. State, that showing was sufficient to avoid “manifest” abuse of discretion.

7. Leslie: when cell-phone location evidence is treated as lay “organization,” not expert science

Leslie’s key evidentiary claim was that the State “backdoored” expert testimony: an analyst testified to location by using cell tower records and mapping software without being qualified as an expert and without providing expert materials 10 days before trial under OCGA § 17-16-4(a)(4).

The Court assumed preservation and still rejected the claim. Its reasoning turned on characterization:

  • the analyst did not purport to explain the science of radio waves or triangulation;
  • he explained columns on admitted carrier records and plotted tower usage onto maps (formerly by hand, now by software);
  • the trial court deemed this akin to “reading a Google map,” i.e., presentation/organization rather than specialized science;
  • defense declined voir dire and did not object when the mapping reports were admitted (each defendant said “No objection”).

By relying on Bullard v. State, Moody v. State, and Pritchett v. State, the Court situated the testimony in the category of experience-based, non-technical summarization. The practical effect is that, on similar records, a trial court may allow tower-based location plotting as lay opinion if it is framed as a straightforward reading/organizing of business records rather than a scientific inference requiring expert methodology.

8. Leslie: ineffective assistance—proof, not possibility

Leslie’s ineffective-assistance claims failed primarily because he did not supply the necessary evidentiary proffers:

  • Unreturned crime-lab testing: no showing the absent results would be exculpatory; speculation is barred by Payne v. State.
  • Severance: no showing the motion would likely be granted; joint trial supported by common scheme and non-antagonistic alibis (per Green v. State, Smith v. State, Lupoe v. State, Butler v. State).
  • Absence at arraignment: even if deficient, no prejudice because Leslie was aware of charges and acquiesced (per Biggs v. State and Keller v. State).
  • Marcus Patton lead: speculative that investigation would identify the true perpetrator.
  • Alibi development: no evidence the sister or an expert would materially strengthen alibi; witness-selection is strategic (Jackson v. State (2024)).

C. Impact

1. Party-to-a-crime “facilitator” liability

The Court’s application of party liability underscores that a defendant who supplies weapons and target information, and who guides perpetrators to victims known to have cash, can face full liability for resulting felonies (including felony murder) even if he departs before the entry/assault. Future cases will cite this opinion alongside Dougherty v. State and Grant v. State to argue that “setup” conduct plus knowledge of lucrative targets supports an inference of shared intent.

2. Causation: resisting over-formalization of medical testimony

By affirming causation without an express “fatal wound” label, the Court signals that causation sufficiency will rarely hinge on whether an expert used a particular conclusion phrase, so long as the narrative of injury and death supports the inference.

3. Arraignment presence: record-building matters

For trial courts and practitioners, the opinion highlights the importance of creating a clear record when a defendant complains about missed appearances: once the court explains what occurred and the defendant then proceeds, signs charging documents, and does not renew objections, appellate courts may find acquiescence.

4. Evidence foundations in modern prosecutions

  • Autonomous surveillance: The opinion strengthens the prosecution pathway for admitting timestamped footage under OCGA § 24-9-923(c) through investigating officers rather than business custodians.
  • Cell-phone location summaries: The opinion provides defendants a clear tactical lesson and prosecutors a clear litigation route. The outcome turned heavily on how the testimony was framed (organizational vs. scientific) and how the defense litigated it (voir dire declined; “No objection” to reports). Future disputes will likely turn on whether the witness draws technical conclusions (e.g., triangulation/precision location) versus merely associating calls with towers and depicting them on maps.

IV. Complex Concepts Simplified

  • “Party to a crime” (OCGA § 16-2-20): You can be guilty even if you didn’t personally commit every act, if you intentionally helped or shared the plan—such as providing a gun, selecting targets, or coordinating the offense.
  • “Common criminal intent”: The shared plan or purpose. Jurors may infer it from actions and relationships, not just from explicit confessions.
  • “Causation” in homicide: The State must prove the defendant’s actions caused the death. This can be shown through circumstances (timeline, nature of injuries) even if a doctor does not use a specific label like “fatal wound.”
  • “Sequestration” (OCGA § 24-6-615): A rule to keep witnesses from hearing each other’s testimony. It has exceptions, including for essential case agents.
  • Authentication of autonomous video (OCGA § 24-9-923(c)): For cameras that run automatically, the court can admit footage if evidence shows it is reliable and time-stamped contemporaneously—without needing the person who “operated” the camera.
  • Lay vs. expert opinion (OCGA §§ 24-7-701, 702): Lay opinion is based on ordinary perception/experience; expert opinion is based on specialized knowledge. The Court treated tower-location plotting as lay where it resembled organizing and presenting admitted records rather than explaining technical radiofrequency science.
  • Discovery sanctions (OCGA § 17-16-6): Even if the State is late, the harsh remedy (exclusion) usually requires proof the State acted in bad faith and the defense was prejudiced.

V. Conclusion

The Supreme Court of Georgia’s decision in SHELLS v. THE STATE and LESLIE v. THE STATE is significant less for creating brand-new doctrine than for sharpening how established doctrines apply to contemporary evidentiary practices and procedural complaints. The Court reaffirmed that:

  • intent as a party to a crime is commonly proven by inference from conduct and coordination, not explicit admissions;
  • homicide causation is a jury question often supported by circumstantial medical and timeline evidence;
  • absence from arraignment can be waived by later informed acquiescence;
  • exclusion for discovery failures hinges on a record showing bad faith and prejudice;
  • timestamped autonomous surveillance is admissible under OCGA § 24-9-923(c) on a showing of reliability; and
  • cell-phone tower mapping may be treated as lay testimony when presented as a non-technical organization of admitted records.

For future litigation, the opinion’s practical guidance is clear: evidentiary outcomes will often turn on how foundations are laid, how objections are developed (or not developed) on the record, and whether disputed testimony is framed as technical science or as straightforward presentation of business records.