Police Chief Nate Harper: "There is no question that Mr. Jordan Miles sustained physical injuries, but there is no evidence to show it was the result of wrongful conduct by the officers."

Jordan Miles, 18, a former student at the city's Creative and Performing Arts high school, said he was brutally attacked by three undercover white police officers on a cold night in January as he walked between his mother's and grandmother's houses in Homewood.

The officers said they confronted Mr. Miles because he appeared to be "sneaking around" a house in the 7900 block of Tioga Street, with a heavy object in his coat that they thought was a concealed weapon. When he was approached by the officers he ran away, but the officers soon caught up with him and beat him into submission by delivering violent blows that left his face swollen and distorted. Police also used a stun gun and pulled out a chunk of his hair. He is  5-foot-6 and 150 pounds and was unarmed.

They charged him with a string of frivilous crimes that a district judge later dismissed.

"The U.S. Attorney's Office, the Civil Rights Division and the FBI, working together, conducted an exhaustive review of the incident, which included interviews of more than 40 witnesses, some on multiple occasions, visits to the scene and careful review of all police reports, medical records, photographs, laboratory reports, cell phone records and other documentation related to the incident," the Justice Department wrote in a statement. "After a lengthy, independent, and thorough review consuming hundreds of hours of agent and prosecutor time, federal officials determined that the evidence was insufficient to prove a federal civil rights violation, beyond a reasonable doubt, against any of the Pittsburgh Bureau of Police officers."