Jayden Frost was booked for Margaret Williams’ murder according to police, but then prosecutors advanced one count of negligent homicide.
PHOENIX, Ariz. — As the case over Margaret “Maggie” Williams’ death heads toward trial, the sharpest public argument is no longer about whether Phoenix police found a suspect. It is about why an arrest announced as part of a murder investigation ended with prosecutors filing negligent homicide.
That distinction matters because it shapes everything that follows in court. Police and prosecutors are working from the same death and much of the same underlying evidence, but they do not play the same role. Police describe an investigation and make arrests. Prosecutors decide what charge they believe can be proved beyond a reasonable doubt under state law. In this case, that difference has left Williams’ family openly frustrated and has made the charging decision itself part of the story.
The public record shows how the case reached that point. Williams, 21, was found dead on Dec. 7, 2024, in the baseball fields near 40th Street and Ray Road. Phoenix police first treated the matter as a death investigation and said no obvious signs of trauma were noticed at the scene. The Maricopa County Medical Examiner’s Office later ruled the death a homicide, and local reporting said the cause was asphyxia due to strangulation. That ruling pushed the case into the homicide track and set the stage for the interviews and document review that followed.
Those later records, as summarized by Law & Crime and ABC15, described Frost’s shifting explanation. Investigators said Williams and Frost had been dropped off at the park, had been drinking and using marijuana, and were dating for about two months. Frost first told police he left to charge his phone and came back to find Williams gone. He later said they had been engaged in sexual activity and that he choked her during what he described as consensual rough sex. The affidavit, according to Law & Crime, said he saw foam coming from her mouth, realized she was dead, panicked and threw away her phone and earbud case because he believed nobody would believe his account. Police said he made up a story rather than calling for help.
The arrest language and the filed charge then split. Phoenix police said Frost was extradited to Arizona on Dec. 31, 2025, and booked into jail “for the murder” of Williams. ABC15 reported that he had been arrested in Ohio earlier that month. Yet the Maricopa County Attorney’s Office proceeded with negligent homicide. In a statement quoted by ABC15, the office said charging decisions are based on the evidence available and the legal standards prosecutors are required to meet, not on a victim’s value. The office also said it would review and modify charges if more evidence were brought forward and submitted by law enforcement.
For Williams’ family, that explanation has not settled the issue. Her parents have said publicly that the facts described in court reporting show more than negligence. Mike Williams told KPNX that the family does not understand why the case was not filed as murder or at least manslaughter. Their complaint is not only emotional. It is also procedural: once prosecutors choose a charge, that choice becomes the framework for plea talks, pretrial motions, jury instructions and the sentence range that may be available if there is a conviction. The family has also pointed to an alleged prior assault accusation involving Frost and another woman, though public reporting has not shown that allegation as a filed part of this case.
The legal process now has a date attached to it. Law & Crime reported that court records showed a May 13, 2026 trial setting. Unless the charge changes before then, that hearing path will test whether prosecutors can persuade jurors that Frost’s conduct meets the negligent homicide standard and not a higher form of criminal homicide. That is a narrower question than the one many members of the public may ask, but it is the question that governs courtroom outcomes.
The case has therefore become two stories at once. One is the underlying homicide investigation into how Williams died on a baseball field. The other is a legal argument over how the state should classify that death. Both now move toward the same courtroom, where the wording of a charge may prove almost as consequential as the facts that first brought police to the park.
Author note: Last updated April 17, 2026.