BIRMINGHAM, Alabama - Authorities on Thursday released the identity of a man who killed himself atop a downtown Birmingham parking deck.

The Jefferson County Coroner's Office identified the man as Todd Eugene Walker, 41, of Pinson. Walker was pronounced dead in the Park Rite parking deck at 9:10 a.m., said Deputy Coroner Bill Yates.

Authorities said Walker was fired from his job at MBA Engineering about noon on Tuesday. He left several notes and his wedding ring at the office before he left.

Police then issued a lookout bulletin for him and his Ford F150 pickup truck but he was not seen again by family or coworkers until the situation began to unfold downtown Wednesday morning. Police believe he was in the downtown area overnight Tuesday.

Birmingham police Lt. Sean Edwards said a co-worker saw Walker at 7:39 a.m. in the Fourth Avenue parking deck, which is not where he normally parked. He was in his truck, and armed with a shotgun. MBA supervisors locked the office doors and ordered employees to stay inside.

Police were called. Officers and the department's SWAT team flocked to the scene, blocking off a multi-block area around a parking deck for a couple of hours. Shortly after officers arrived on the scene, witnesses and police reported hearing a single gunshot.