A timeline of the shooting that killed 9 in Dayton, Ohio

This August 2019 photo provided by the Dayton Police Department shows the firearm used by Connor Betts in a mass shooting in a popular entertainment district on Aug. 4, 2019, in Dayton, Ohio. (Dayton Police Department via AP)The Associated Press
This August 2019 photo provided by the Dayton Police Department shows the firearm used by Connor Betts in a mass shooting in a popular entertainment district on Aug. 4, 2019, in Dayton, Ohio. (Dayton Police Department via AP)

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:

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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.