California Legal Brief

The Rule of People v. Demolle is that a suspect's consent to provide a blood sample is not the product of an unlawful detention where the encounter remains consensual, under circumstances where a reasonable person would feel free to leave or terminate the encounter despite being taken to a police station and briefly held in locked interview rooms.

Appeal from judgment after jury trial in Superior Court, Alameda County.

Defendant Appellant was Alex Demolle — the defendant who confessed to raping and strangling 11-year-old Jaquita Mack.

Plaintiff Respondent was The People — the prosecution seeking to uphold defendant's first degree murder conviction and death sentence.

The suit sounded in criminal law. [Not determinable from opinion text if there were cross-claims.]

The key substantive facts leading to the suit were that on July 23, 1999, defendant encountered 11-year-old Jaquita Mack when she fell off her bicycle near his apartment. He invited her inside to play video games, then sexually assaulted her, and strangled her to death when he feared going to jail. He disposed of her body on a hillside. Police obtained defendant's blood sample during a voluntary interview, which matched DNA evidence from the victim's body, leading to his confession.

The procedural result leading to the Appeal: The trial court denied defendant's motion to suppress his blood sample and subsequent confession, ruling that defendant was not unlawfully detained when he consented to provide blood, and denied his motion for mistrial based on alleged juror bias regarding testimony about defendant shooting at birds with a BB gun.

The key question(s) on Appeal: 1. Whether defendant was unlawfully detained in violation of the Fourth Amendment when he consented to provide a blood sample during police questioning at the station. 2. Whether the trial court erred in denying defendant's motion for mistrial based on alleged bias of Juror No. 7 regarding testimony about shooting at birds.

The Appellate Court held that defendant was not unlawfully detained when he voluntarily accompanied police to the station and consented to blood testing, where the encounter remained consensual throughout, and that the trial court properly denied the mistrial motion where stricken testimony about shooting at birds did not irreparably prejudice defendant's case.

The case is inapplicable when police use force, threats, or intimidation to compel cooperation, when suspects are formally arrested or restrained, when questioning becomes accusatory or confrontational, or when defendants clearly express unwillingness to continue cooperating.

The case leaves open questions regarding the precise boundaries of consensual encounters at police stations, the effect of Miranda warnings on Fourth Amendment detention analysis in other factual contexts, and the specific circumstances under which being held in locked rooms would transform a consensual encounter into a detention.