Police on Friday identified the officer who fatally shot an unarmed black teenager and released documents alleging the young man had been suspected of stealing a $48.99 box of cigars from a convenience store in a "strong-arm" robbery shortly before he was killed.

Police Chief Thomas Jackson said the officer did not know the teen was a robbery suspect at the time of the shooting and stopped Michael Brown and a companion "because they were walking down the middle of the street blocking traffic."

Darren Wilson, 28, has been an officer in suburban St. Louis for six years and had no complaints filed against him, Jackson said.

Brown's relatives immediately questioned whether the officer really believed Brown was a suspect and said no robbery would justify shooting the teen after he put his hands up.

The family's attorney, Benjamin Crump, said Brown's parents were blindsided by the allegations.

"It's bad enough they assassinated him, and now they're trying to assassinate his character," Crump said.

Read the full story at the Associated Press