For six years, Karen Goodwin believed her son died of an overdose. But after she finally saw the police body-camera footage, her memories now conflict with stark images of restraint and force.

Jameek Lowery, a 27-year-old Black man, was among more than 330 Black people who died after police stopped them with tactics that aren’t supposed to be deadly, like physical restraint and use of stun guns, The Associated Press found.

FRONTLINE and The Associated Press investigate deaths that occurred after police used tactics like prone restraint and other “less-lethal force.”