DALLAS - A man wrongly identified by Dallas police as a suspect in a sniper attack on police says he turned himself in and was quickly released.

The Dallas Police Department put out a photo on its Twitter account late Thursday of a man wearing a camouflage shirt and holding a rifle with the message: "This is one of our suspects. Please help us find him!" The tweet remained on the account early Friday morning.

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The man in the photo, Mark Hughes, tells Dallas TV station KTVT that he "flagged down a police officer" immediately after finding out he was a suspect. He says police lied during a 30-minute interrogation, telling him they had video of him shooting.

Videos posted online show Hughes walking around peacefully during the shooting and later turning over his gun to a police officer.