Emotions were running high in Canton, Ohio, Thursday, as family and friends of a man named Frank Tyson held a news conference in the city.

Tyson was killed last month while in the custody of police officers.

The video shows officers struggling with Tyson before one of the officers restrains him. One officer appears to put his knee on Tyson’s upper body while Tyson says he can’t breathe.

CGTN’s Dan Williams reports.