On the evening of May 15, 2020, a gathering at a Waterloo, Iowa, home ended with 30-year-old Terrell Bernard Flowers shot and killed after an argument with 28-year-old Stephen Devon Phillips. Phillips had been asked to leave; witnesses said he threatened to come back and shoot up the place. Surveillance footage captured Phillips arriving with a handgun and leaving shortly after the shooting.

Investigators quickly focused on Phillips. He was incarcerated on unrelated charges soon after the incident and was later charged with first-degree murder in March 2021. At trial Phillips claimed self-defense, saying Flowers attacked him and had a gun. The prosecution introduced a threatening text sent to Flowers minutes before the encounter and witness testimony that both men initially had guns drawn but Flowers had holstered his weapon before being shot. In February 2022 a jury convicted Phillips of first-degree murder.

Did anyone at the gathering see what sparked the first argument or have additional details about the moments before the shooting?