The investigation shifted over months, from no obvious trauma at the scene to an arrest and a confession described in court records.
PHOENIX, Ariz. — The criminal case against Jayden Frost grew out of an investigation that changed shape over time, beginning with a woman found dead on a baseball field at sunrise and ending, more than a year later, with a homicide charge tied to what police say Frost admitted happened there.
That arc is the heart of the case. Public records show that when officers first arrived on Dec. 7, 2024, the death of 21-year-old Margaret “Maggie” Williams was not immediately described as a homicide. Only later, after the Maricopa County Medical Examiner’s Office completed its work, did Phoenix police say the death had been ruled a homicide and assign the case to detectives. The later arrest of Frost, Williams’ boyfriend at the time, came after investigators said his original account broke down and he acknowledged choking her during sexual activity.
The first official account was brief. Phoenix police said patrol officers were called to the baseball fields near 40th Street and Ray Road at about 7 a.m. and found Williams dead. Fire personnel had already confirmed her death. Detectives responded, but the police advisory said no obvious signs of trauma were noticed at the scene, so the matter began as a death investigation. The medical examiner’s office then took custody of the body. That early description matters because it explains why the case moved in stages rather than in one straight line from discovery to arrest.
The medical findings changed everything. On Feb. 5, 2025, Phoenix police announced that homicide detectives had taken over after the medical examiner ruled Williams’ December death a homicide. Later court reporting added the key detail that the cause of death was asphyxia due to strangulation. By then, the case had become something more focused and more urgent: detectives were no longer trying only to explain an unattended death in a park, but to trace the last hours of a young woman whose injuries, officials said, were consistent with strangulation.
Investigators’ understanding of those last hours came from Frost’s own statements, according to court documents summarized by local outlets. He first said he left the park around 11 p.m. to charge his phone at a grocery store while Williams stayed behind because she was having a good time. He then said he returned about an hour later, found her missing, and later searched for her with a friend before locating her body on the field. Police said that explanation quickly unraveled. Frost later admitted he and Williams had been engaging in what he described as consensual rough sexual activity and that he was choking her at the time. The affidavit, as quoted in news reports, said he saw foam coming from her mouth, realized she was dead, panicked and began throwing away items instead of calling police.
By late 2025, the investigation had crossed state lines. ABC15 reported that Frost was arrested in Ohio on Dec. 15, 2025. Phoenix police later said he was extradited to Arizona on Dec. 31 and booked into jail. In its public advisory, the department said Frost had been booked “for the murder” of Williams, but the prosecution that followed took a narrower form. The Maricopa County Attorney’s Office moved forward on one count of negligent homicide. That gap between the language of a police announcement and the formal charge filed by prosecutors has become one of the most discussed parts of the case.
There are still pieces of the story that remain uncertain in public view. Public reports say Williams and Frost had been dating for about two months. They had reportedly been drinking alcohol and using marijuana before the encounter at the park. Investigators also described signs at the scene that were disturbing and specific, including neck injuries and bodily fluid from Williams’ mouth and nose. But many forensic and procedural details have not been released publicly, and the full court record has not been laid out in open reporting. What is known is enough to define the investigation, but not enough to answer every question that the family and the public continue to raise.
Those questions now move into court. Prosecutors have said their charging decision reflects the evidence they believe they can prove under Arizona law, not the value of Williams’ life. Her family has sharply disagreed and has called for harsher charges. Local reporting cited a May 2026 trial setting, which means the case is entering the phase where interviews, forensic conclusions and legal standards will be tested together instead of separately.
The investigation began with a body in a quiet park and almost no public explanation. It now stands as a homicide case built from an autopsy, a reconstructed timeline and a statement that police say Frost changed when his first version no longer held.
Author note: Last updated April 17, 2026.