Date: May 20, 2026

State v. Castrillo: Exclusive-Care Medical Causation Plus Inculpatory Post-Event Conduct Supports Sufficiency; Predating Social-Media Photo Not “Material” Newly Discovered Evidence

1. Introduction

In State v. Castrillo (N.M. Sup. Ct. May 18, 2026), the Defendant, Lalo Anthony Castrillo, IV, appealed his conviction for intentional child abuse resulting in death under NMSA 1978, § 30-6-1(D), (H) (2009). The case centered on the death of two-year-old Faviola Rodriguez, who became unresponsive and died after being left overnight in the Defendant’s exclusive care.

The appeal raised two issues: (1) whether the State presented sufficient evidence that the Defendant caused the fatal injuries, where the defense theory attributed death to rebleeding from older injuries; and (2) whether the district court abused its discretion in denying a motion for new trial based on allegedly newly discovered evidence—a social-media photo posted by the child’s mother.

The Supreme Court resolved the appeal by nonprecedential decision pursuant to Rule 12-405(B)(1)-(2) NMRA, but the decision still illustrates how New Mexico appellate courts evaluate causation and identity in child-abuse-death prosecutions, and how they apply the “materiality” requirement for new-trial motions.

2. Summary of the Opinion

The Court affirmed the conviction and the denial of a new trial. On sufficiency, it held that the combination of: (a) medical testimony describing multiple acute head injuries inflicted “around the time of death”, (b) testimony that the child was in good condition with no visible injuries before being left with Defendant, (c) the Defendant’s undisputed exclusive access during the relevant period, and (d) corroborating evidence including a significant delay in seeking emergency help and internet searches, provided substantial evidence for a rational jury to find guilt beyond a reasonable doubt.

On the new-trial issue, the Court concluded the social-media photo was taken six months before the child’s death and thus was not material to the issues litigated at trial; accordingly, the district court did not abuse its discretion in denying the motion.

3. Analysis

A. Precedents Cited

State v. Duran, 2006-NMSC-035 (quoting State v. Sutphin, 1988-NMSC-031 and State v. Cunningham, 2000-NMSC-009): The Court used these cases to restate the controlling sufficiency framework: whether substantial evidence—direct or circumstantial— supports each essential element beyond a reasonable doubt, viewing evidence in the light most favorable to the verdict and resolving conflicts in favor of the verdict.
State v. Rojo, 1999-NMSC-001: Cited for the principle that contrary evidence supporting acquittal is not a basis for reversal because the jury may reject the defendant’s version of events. This undercut the defense’s alternative medical narrative (rebleeding from older injuries) as a sufficiency argument on appeal.
State v. Soto, 2025-NMSC-051: The Court treated Soto as the closest analogue and effectively as the template for analysis. In both cases, the child was in the defendant’s exclusive care during the relevant period; medical experts identified nonaccidental head trauma as the cause of death; and additional inculpatory conduct supported guilt. The Court imported Soto’s reasoning: medical causation plus corroborating circumstances can be enough even where the defendant posits an alternative accident/rebleed explanation.
State v. Wilson, 2001-NMCA-032, overruled on other grounds as recognized by State v. Montoya, 2005-NMCA-078: Quoted (via Soto) for the proposition that evidence the defendant had the “best opportunity to inflict the injury” may support a guilty verdict for child abuse resulting in death. The Court used this concept to rebut the defense attempt to distinguish Soto on timing and opportunity.
State v. Consaul, 2014-NMSC-030: Used (again through the Soto analogy) to reinforce that the combined medical and inculpatory evidence can satisfy the “beyond a reasonable doubt” threshold under substantial-evidence review.
State v. Garcia, 2005-NMSC-038: Established the abuse-of-discretion standard for appellate review of a trial court’s denial of a motion for new trial.
State v. Volpato, 1985-NMSC-017 and State v. Fero, 1988-NMSC-053: The Court relied on these cases for the requirements governing newly discovered evidence, particularly materiality. Under Fero, evidence is material if disclosure would have a reasonable probability of producing a different outcome at trial.

B. Legal Reasoning

1) Sufficiency of evidence (causation and identity). The Court’s analysis proceeded in two steps consistent with New Mexico sufficiency doctrine:

Medical causation supporting nonaccidental injury near the time of death. The autopsy evidence described multiple acute injuries (including multiple scalp bruises indicating multiple impact sites; acute subdural hemorrhage; acute subarachnoid hemorrhage; and acute hemorrhage around the optic nerve). The State’s pathologist testified these injuries were inflicted “around the time of death,” were multifocal (distributed in multiple brain areas), and were inconsistent with a simple fall producing “this much injury.” Although older healing injuries existed, the expert concluded death resulted from the combination of blunt head injuries, including the acute injuries. This allowed a rational jury to infer (i) the fatal event was nonaccidental and (ii) the acute injuries occurred within the time window when the Defendant had exclusive care.
Corroborating circumstances linking the Defendant to the injuries. The Court emphasized evidence that the child was observed in good condition earlier that day and had no visible injuries before being left with Defendant, coupled with undisputed exclusive access overnight. It then relied on post-event conduct: Defendant delayed calling 911 for more than an hour, conducted internet searches (“how to get blood pu[m]ping w[hen] child in shock,” “child c[hok]es on throwu[p] during sleep”), and took a photo of the child while apparently unconscious. This evidence served the same corroborative function as in Soto: it supported consciousness of guilt and undermined an innocent-accident narrative.

The Court rejected the defense attempt to reframe the case as “medical evidence insufficient as a matter of law” because, under Duran/Sutphin/Cunningham, the question is not whether an alternative explanation exists, but whether substantial evidence supports the verdict when inferences and conflicts are resolved in the State’s favor. Under Rojo, the jury’s prerogative to reject the defense theory foreclosed reversal.

2) Newly discovered evidence and “materiality.” Applying Garcia’s abuse-of-discretion review and Volpato/Fero’s materiality requirement, the Court held the social-media photo could not reasonably affect the outcome because it was taken six months before death—months before the earlier injuries Defendant claimed were the true cause. Without a plausible connection to the disputed timing, mechanism, or identity questions at trial, it was not “material” in the Fero sense (no reasonable probability of a different verdict).

C. Impact

Although designated nonprecedential under Rule 12-405 NMRA, the decision signals several practical implications for litigants:

Child-abuse-death prosecutions: The Court reaffirms the Soto approach: where medical testimony supports nonaccidental trauma within a relevant time window, the State can strengthen causation and identity through circumstantial evidence of exclusive access and defendant conduct (including delay in seeking care).
Defense “rebleed/older injury” theories: The opinion illustrates that appellate sufficiency review will not reweigh competing medical narratives where the State’s expert provides a coherent causal explanation tied to timing and injury pattern (e.g., multifocal injuries, multiple impact sites).
New-trial motions based on digital/social evidence: The decision underscores that “newly discovered” is not enough; the evidence must be material in a way that can plausibly move the verdict. Content lacking temporal or causal linkage to the charged event will be treated as non-material.

4. Complex Concepts Simplified

Substantial evidence: Enough evidence that a reasonable juror could find each element proven beyond a reasonable doubt, even if other evidence points the other way.
Viewing evidence “in the light most favorable to the verdict”: On appeal, courts assume the jury believed the State’s witnesses and drew reasonable inferences supporting guilt.
Causation in homicide/child-abuse-death: The State must show the defendant’s acts were a cause of death. Here, the medical expert tied acute blunt-force head injuries to death, within the relevant time.
Subdural hemorrhage / subarachnoid hemorrhage: Bleeding in and around the brain, often used in forensic pathology to assess head trauma and whether injuries are consistent with accidental falls or inflicted blows.
Multifocal injuries: Injuries in multiple locations—often used to argue against a single accidental impact and in favor of multiple impacts or broader trauma.
Abuse of discretion: A deferential review standard. The appellate court will uphold the trial court unless the ruling is clearly unreasonable or based on an incorrect understanding of the law.
Material newly discovered evidence: Evidence that, if it had been available, has a reasonable probability of changing the trial outcome. A photo taken long before the relevant events usually fails this test.

5. Conclusion

State v. Castrillo affirms that, under New Mexico’s substantial-evidence framework, a conviction for intentional child abuse resulting in death can be supported by medical testimony identifying acute, nonaccidental injuries occurring near death, combined with circumstantial proof of exclusive opportunity and inculpatory post-event conduct. It also reinforces that a motion for new trial based on newly discovered evidence fails where the proffered evidence is not material—i.e., it lacks a reasonable probability of changing the verdict—particularly when the evidence predates the relevant injuries and death by months.