Around 7 p.m. on Aug. 12, police were called to Sky Zone in Timonium regarding a shooting, the Baltimore County Police said.
Once at the scene, officers found 32-year-old Marcus Whitehead with several gunshot wounds.
He was transported to a nearby hospital, where he was pronounced dead, officials said.
Walker told police that he greeted his daughter and then Whitehead was staring at him, so he asked if Whitehead wanted to talk outside, WJZ-TV reported.
Whitehead reportedly told Walker not to come near him and threatened to slap him, authorities said.
Walker told police that Walker stood up at some point and started walking toward him, so he took out his firearm and fired all the rounds he had loaded in the gun, according to court documents.
After Baltimore County Police arrived at the scene, they were informed a man had called 911 and wanted to turn himself in for the Sky Zone shooting, WJZ-TV reported.
Never miss a story — sign up for the Front Page Detectives newsletter. Be on the scene the moment news breaks.
Officers found Walker in a U-Haul about an hour after the shooting took place. He allegedly told police that he wanted to return the U-Haul before he turned himself in, according to WJZ-TV.
His next court date is scheduled for Sept. 8.
Become a Front Page Detective
Sign up to receive breaking
Front Page Detectives
news and exclusive investigations.