A Fourth of July cookout in 2014 ended in gunfire in Homewood, Pennsylvania. Around 3:15 p.m., a man entered a Tioga Street home through a back door and fired two shots in the kitchen, striking 30-year-old Kaamil Arnold. Arnold died at the scene and the shooter fled through the front door.

Investigators quickly focused on Zachary Threats, then 36 of McKees Rocks, after witnesses at the party identified the shooter by the nickname Ouga; that nickname was linked to Threats in a police database and a photo identification followed. A warrant was issued and U.S. Marshals arrested Threats on August 12, 2014, in Garfield. Prosecutors said a motive was a few days earlier when Arnold allegedly took about $4,000 from Threats with the promise of delivering crack cocaine that never materialized. Two friends of Threats testified they were told he was involved, and Arnold’s fiancée and her brother identified Threats the day after the killing.

A jury later convicted Zachery Threats of first-degree murder and burglary; he received life without parole for the murder plus 10 to 20 years consecutive for burglary. Did anyone at that cookout notice anything unusual about arrivals or a confrontation in the days before the shooting?