Derrick Stafford was convicted in the November 2015 shooting that killed Jeremy Mardis and critically wounded his father after a 3-kilometre car chase.

The gruesome encounter was captured on tape by another police officer's body camera.

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.