Protests have erupted in Washington, D.C. and four police officers have been placed on leave after authorities reviewed body camera footage of a fatal chase involving 20-year-old Karon Hylton, a Black moped rider last week.

CBS News reports the officers pursued Hylton for nearly two minutes because he was riding without a helmet. The 20-year-old collided with a non-police car on October 23 as he exited an alley and fell to the ground. He later died of his injuries. 

"Officers activated their emergency lights and attempted to make a traffic stop," police said in a statement, according to FOX 5 DC. "When the moped exited an alley in the 700 block of Kennedy St, NW, the moped collided with a passenger vehicle that was traveling on Kennedy Street."