On the evening of Sunday, September 10, 2017, Antwaun Smith, 41, was found inside a home in the 600 block of Newton Place NW in the Park View neighborhood of Northwest Washington, D.C., suffering from a gunshot wound. Police arrived around 9:30 p.m.; Smith was pronounced dead at the scene.

Investigators quickly focused on a family member. On September 18, the Capital Area Regional Fugitive Task Force arrested Antonio Williams, 36, of Northwest D.C., identified as Smith’s stepbrother who lived about a block away. Authorities said the two men had argued over allegations that Smith had cooperated with police in a prior robbery probe, a dispute that reportedly escalated into the fatal shooting. Williams was charged with second-degree murder while armed.

Was anyone in Park View that week aware of rising tensions between the two men or any incidents that might shed light on what led to this confrontation?