The July 17, 2016, attack by gunman Gavin Long claimed the lives of two police officers and a sheriff's deputy and wounded two deputies and an officer.

Lawyers for one of the wounded law enforcement officers filed the complaint Friday in US District Court for the Middle District of Louisiana against various arms of the Black Lives Matter movement and leaders including DeRay Mckesson and Johnetta Elzie.

The complaint alleges Black Lives Matter and its leaders are responsible for the shooting because they "incited the violence against police in retaliation for the death (sic) of black men shot by police," and "did nothing to dissuade the ongoing violence and injury to police."

"In fact, they justified the violence as necessary to the movement and war," the complaint says.