Mumia Abu-Jamal (born Wesley Cook; April 24, 1954) is an American political activist and journalist who was convicted of murder and sentenced to death in 1982 for the 1981 murder of Philadelphia police officer Daniel Faulkner. While on death row, he wrote and commented on the criminal justice system in the United States. After numerous appeals, his death sentence was overturned by a federal court. In 2011, the prosecution agreed to a sentence of life imprisonment without parole. He entered the general prison population early the following year.

Wild that there seems to be no details about the physical confrontation between Faulkner and Cook on the wikipedia pages. It being 80's philly I can take a wild guess on what actually happened.