Louisiana State Police said Lafayette officers followed Trayford Pellerin, 31, on foot as he left a convenience store where he had created a disturbance with a knife about 8 p.m. Friday

After a police body camera captured two deputy city marshals firing on a car and killing a 6-year-old boy, the head of the Louisiana State Police said the video was the most disturbing thing he's seen.

Victims Michael and Trudi Hardman were both primary-school teachers from Texas. Also killed were Dakota Watson, 15, Adam Hardman, 7; and daughter Kaci Hardman, 4.