Officer Marc Tyler Brock was shot and killed while serving a cyberstalking warrant in Vivian, Louisiana, on Friday, November 14, 2025. The 25-year-old officer was struck by gunfire through a closed door shortly before 5:30 p.m. and later died at North Caddo Medical Center.

A 58-year-old man, Nicolas Alexander, remained inside the residence and barricaded himself for several hours before surrendering to a SWAT team and being taken into custody. Alexander was charged with second-degree murder and cyberstalking.

Brock was remembered as engaged to be married the following spring and as an officer who frequently took extra shifts and supported colleagues. The community and his family mourned his death.

If anyone has information about the shooting or the events that led up to the warrant service, please come forward.