Background
On July 23, 1999, 11-year-old Jaquita Mack went missing while riding her bicycle near her parents’ home on East 29th Street in Oakland. Her body was discovered the next day on a hillside about a mile away, wrapped in a sheet. An autopsy determined she had died of asphyxia due to strangulation, and forensic examiners recovered sperm from the victim’s body.
Two weeks later, Oakland Police Sergeant Derwin Longmire conducted a neighborhood canvass and spoke with defendant Alex Demolle, who lived around the corner. During a follow-up visit, Demolle voluntarily accompanied Longmire to the police station and consented to a blood draw. The DNA profile from Demolle’s blood matched the sperm recovered from the victim. Demolle was arrested and confessed to raping and strangling Jaquita after luring her into his apartment.
A jury convicted Demolle of first degree murder with special circumstances of murder during the commission of rape and murder during the commission of a lewd act on a child under 14 (Penal Code §§ 187, 190.2, subd. (a)(17)(C), (E)). The jury returned a verdict of death, which the trial court imposed. This automatic appeal followed.
The Court’s Holding
The California Supreme Court affirmed the judgment in its entirety. Chief Justice Guerrero’s opinion for the majority methodically addressed and rejected each of Demolle’s appellate claims.
Demolle’s central argument was that his consent to the blood draw was the fruit of an unlawful detention under the Fourth Amendment. The court rejected this, finding that Demolle’s encounter with Sergeant Longmire was consensual at every stage: Demolle answered the door, invited Longmire in, voluntarily accompanied him to the police station, and ultimately agreed to provide a blood sample. The court concluded that Demolle was not seized within the meaning of the Fourth Amendment because a reasonable person in his position would have felt free to decline the officer’s requests.
The court also rejected challenges relating to juror bias, the admission of evidence, and various penalty phase issues, finding all claims either meritless or harmless. Justices Liu and Evans filed separate concurring and dissenting opinions but would not have affirmed the death sentence in full.
Key Takeaways
- The court reaffirmed that a voluntary encounter with law enforcement—including agreeing to visit a police station and consenting to a blood draw—does not constitute a seizure under the Fourth Amendment, even when the encounter ultimately yields incriminating evidence.
- In automatic death penalty appeals, the California Supreme Court undertakes an exhaustive review of all claimed errors at both the guilt and penalty phases, and will affirm where assumed errors are found individually and cumulatively harmless.
- The split among the justices—with Liu and Evans dissenting on the death sentence—reflects the continuing debate within the court over the application of the death penalty, even in cases involving particularly egregious facts.
Why It Matters
This decision is significant as one of four death penalty cases the California Supreme Court resolved on June 1, 2026. Although the facts of Demolle are extreme and the legal issues largely track established precedent, the decision provides a thorough restatement of Fourth Amendment consent doctrine in the context of police canvasses and DNA collection. For criminal defense attorneys handling capital cases, the opinion reinforces the high bar for suppression when a defendant’s cooperation with law enforcement appears voluntary at each step of the encounter.