Trenton Xavier Jamal Washington, 22, was shot and killed on the evening of September 4, 2015, on Sampson Street in Des Moines following an altercation. He was taken to Mercy Hospital, where he died; the shooting was the city’s seventh homicide that year.

The Des Moines Police Department opened a homicide investigation and identified 21-year-old Michael Cason Jr. as a suspect. Cason was arrested on September 8, 2015, and charged with first-degree murder; authorities did not publicly state a specific motive at the time of the arrest.

At trial, a jury found Michael Cason Jr. guilty of first-degree murder on January 30, 2017. No other suspects were reported arrested or believed to be involved.

If anyone knew Trenton or witnessed the September 4 incident on Sampson Street, please share what you remember.