Anti-police activist and former NFL quarterback has called for the Philadelphia District Attorney's Office to release convicted cop killer Mumia Abu-Jamal.

In a video Kaepernick claims that Black Panther Mumia was framed for the murder of Officer Daniel Faulkner in 1981, Fox News reports.

During a routine traffic stop almost 39 years ago, Officer Faulkner stopped a vehicle belonging to Abu-Jamal's younger brother William Cook. The two got into a physical confrontation and Abu-Jamal, who was in the vicinity and observed the fight, ran over and shot Faulkner in the back and, later, in the face.

Abu-Jamal was originally sentenced to death. That sentence was converted to life without parole in 2013. He is currently appealing his conviction and the case is before the Pennsylvania Supreme Court.