Civil rights attorney Ben Crump posted footage obtained by a security camera at a nearby home, not far from where 29-year-old Dijon Kizzee was shot multiple times and killed on the spot Monday afternoon. His death has come under scrutiny and sparked protests.

LASD says officers were attempting to stop Kizzee after they found he was "in violation of vehicle codes" while riding his bike. They say they pursued him when he fled ... and things escalated into a physical confrontation between Kizzee and at least one deputy, which you can see here.

The Sheriff's Dept. goes on to say that during the struggle, some items Kizzee was carrying fell on the ground ... one of which they claim was a handgun. LASD claims at that point, Kizzee broke free and tried fleeing once again, but officers fired multiple rounds and took him down.

Crump and others contend that even if a gun was in Kizzee's possession during the altercation, he didn't point it at them and was not a threat by the time he ran a second time. They're demanding Sheriff Alex Villanueva release the names of the deputies who fired the shots ... while also asking for their arrest and eventual prosecution. The case is under investigation.