Hours before he slaughtered nine people, including his sister, in Dayton’s nightlife district, Connor Betts hung out in a bar with her and a pal — showing no sign of the horror he was about to unleash.

Surveillance video obtained by CNN shows 24-year-old Betts entering Blind Bob’s Bar in the Oregon District with a woman who appears to be his sister, Megan Betts, and another man.

Police have only described that man as a companion, but through photos and interviews with acquaintances, CNN confirmed his identity as Charles Beard.

The footage shows Connor wearing a T-shirt, shorts and sneakers, with no sign of the vest and mask he wore during the shooting. He’s shown walking in first, being carded and receiving a wrist band and then waiting for the other two to walk in.

Then he’s seen moving to the patio and back to the bar.

Dayton police said Monday that they spoke with Beard, and there’s no information leading them to believe that either he or Megan were aware that Connor had weapons, according to CNN.

When contacted by the network, Beard’s father declined to comment.

Connor parked in the area around 11 p.m. and went to the bar with the duo prior to the shooting, a law enforcement source told the network.

After spending about an hour there, the video shows him stopping by the entrance around 12:13 a.m., speaking with staff and then walking out — leaving his sister and friend behind.

The two stayed there for about 45 minutes before leaving around 12:59 a.m., the source said.

The first calls reporting the shooting came in seven minutes later, at 1:06 a.m. Authorities are piecing together what happened in the interim.

“The information we have is they all came in the same vehicle but they separated at some point,” Dayton Police Chief Richard Biehl said at a news conference, according to CNN.

There was “some communication” between Connor and Beard after they separated, Biehl added, but he did not provide any other details.

The video does not show any fights or arguments that could have provoked the deadly rampage.

Connor’s silhouette is captured one more time on the video after he already began opening fire — as people desperately try to find cover.

Multiple acquaintances confirmed to CNN that Connor is in fact shown in the video.

An employee told the outlet that Connor had been at the bar before.

“Through our investigation, we are aware the suspect did frequent bars in the Oregon District on a regular basis,” Dayton police said in a statement obtained by the network.

Bystander Sarah Reeves, who helped the wounded after the shooting, told CNN that Beard, though seriously hurt, had only one concern.

“He just kept asking about Megan; he wanted to know if she was OK,” Reeves said. “He was moaning a lot. People were trying to assist him, including my fiancé.”

A total of nine people — including Megan — were killed in the gunfire. Fourteen others, including Beard — who was shot in the lower torso — were wounded.