mugshot of Jared Loughner (Pima County Sheriff's Office)
TUCSON, Ariz. (AP) -- Authorities say the busy morning for the suspected gunman in the Arizona rampage included trips to Walmart, a traffic stop and a confrontation with his father before the shooting.
Capt. Chris Nanos of the Pima County Sheriff's Office said Wednesday that Jared Loughner made some purchases at Walmart, but he wouldn't say what he bought. Authorities say Loughner was then pulled over for running a red light, but was let go with a warning.
RELATED STORY: Dad Pursued Arizona Massacre Suspect Before Shooting
MORE: Stories, Blogs, Videos about Arizona Shooting
A short time later, he had a confrontation with his dad over a black bag and Loughner took off running.
Loughner is accused of then going to Rep. Gabrielle Giffords' event at a Tucson grocery store and firing on the crowd, gravely injuring the congresswoman and killing six people.