In the pre-dawn hours of April 26, 2021, 21-year-old Ryan Prendergast, a Caucasian man, was fatally shot in Salt Lake City, Utah. Prendergast was staying in a tent near 900 South and 500 West with a female companion when a man, later identified as 33-year-old William Henry Clark, arrived at the encampment and confronted the woman, his ex-girlfriend. Clark reportedly pressed the barrel of a firearm to her cheek. Prendergast came out of the tent and was struck by a single gunshot to the chest; Clark fled the scene in a vehicle. Witnesses reported seeing a sedan near the homeless encampment around the time of the shooting, and the woman called for help, prompting a homicide investigation by the Salt Lake City Police Department.

Police located Clark the next day at an apartment in Magna, where he had barricaded himself with his 14-year-old son. After about 12 hours, a SWAT team used tear gas to force Clark and the boy out; both were taken into custody and treated for gas exposure. Clark was charged with aggravated murder and aggravated kidnapping; he was on felony probation at the time and had a criminal history. What details about the incident or the people involved might help fill gaps in the timeline or lead to additional witnesses?