Police say the gunman who opened fire in Dayton, Ohio, around 1 a.m. Aug. 4 went to a nightlife area with his sister and another companion, then parted from them and carried out a half-minute rampage that killed nine, including the sister. Police haven't confirmed a motive but said Tuesday that surveillance video and other evidence helped them piece together a rough timeline of what happened:
11:04 p.m.: Connor Betts, 24, arrives in Dayton's Oregon district with his 22-year-old sister and a male companion. They go to a bar, Blind Bob's.
12:13 a.m.: Betts leaves them and goes across the street to another bar, Ned Peppers.
12:42 a.m.: Betts leaves Ned Peppers and returns to their vehicle in a nearby parking lot, where he changes clothes and retrieves his firearm.
12:55 a.m.: Carrying a backpack, Betts retraces his path toward the bars, disappearing from camera view for nine minutes behind another tavern.
1:04 a.m.: Betts emerges and moves down an alley next to Blind Bob's, readying the weapon to fire.
1:05 a.m.: Betts opens fire outside Blind Bob's. The first victims include his sister and the surviving companion, who were near a taco stand out front. Betts continues to fire and moves toward Ned Peppers, where police fatally shoot him outside the building. It's over in about 32 seconds.