Jared Loughner, 22, dropped the film off to be developed on the eve of the shooting, checked into a motel and then picked up the photos a couple of hours later, according to a detailed timeline released by the Pima County Sheriff's Office. He also bought ammunition and a diaper bag at a Wal-Mart less than three hours before the shooting.
Special Report: Tragedy in Tucson
The complete timeline released by the Pima County Sherriff's Office. CBS News edited the timeline for clarity:
Nov. 30, 2010: Loughner Model 19, 9mm handgun with extended magazine and one box of ammo Winchester.
Jan. 7, 2010, 11:35 p.m.: Loughner drops off roll of 35mm film to be developed at Walgreens, 3800 W. Ina Road, Tucson.
Jan. 8, 2010, 12:24 a.m. : Loughner makes a purchase at Circle K Store #3400, 4900 W. Ina Road, Tucson.
12:29 a.m.: Loughner checks into Motel 6, 4630 W. Ina Road, Tucson.
2:19 a.m.: Loughner returns to the Walgreens to retrieve developed photos and makes a purchase.
2:34 a.m.: Loughner makes purchase at a Chevron Store, 4202 W. Ina, Tucson.
4:12 a.m.: Loughner posted bulletin on Myspace titled post "Goodbye friends" and posted a photo from Walgreens on website.
6:12 a.m.: Loughner makes purchase at a Wal-Mart at Foothills mall, 7635 N. La Cholla Blvd., Tucson.
6:21 a.m.: Loughner makes purchase at a Circle K Store at 3712 W. Cortaro Farms Rd., Tucson.
7:04 a.m. Lougher returns to the Wal-Mart and tries to buy ammunition.
7:24 a.m.: Lougher buys ammunition and a backpack-style diaper bag at another Wal-Mart, this time a Super Wal-Mart at 8280 N. Cortaro Road, Marana, Ariz.
7:30 a.m.: Arizona Game & Fish Department Officer and Cortaro Road and I-10.
7:31 a.m. to 9:40 a.m.: Loughner returned home, removed a from the vehicle. His father confronted him and he fled on foot carrying the black bag.
9:41 a.m.: Cab driver picks up Loughner from Circle K at 3712 W. Cortaro Farms Road, Tucson, and drives him to Safeway, 7100 N. Oracle Road, Tucson.
9:54 a.m.: Cab driver and Loughner go into the Safeway to get .
10:10 a.m.: Loughner opens fire. Six people were killed and 13 were injured.
10:11 a.m.: Pima County Sheriff's Office receives 911 call.
10:14 a.m.: First paramedic unit, Rural Metro Fire Rescue 76, dispatched to shooting at Safeway.
10:15 a.m.: Deputy Thomas Audetat is the first deputy on scene and detains Loughner.
10:16 a.m.: Deputy Georgina Patino is the second deputy on scene and secures the weapon.
10:19 a.m.: Medical personal arrive at the crime scene.
10:31 a.m.: Southwest Ambulance Paramedic 831 arrives at the scene.