The Carter Lake convenience store clerk shot and killed Thursday night had told a family member about a confrontation he'd had with a man.

Robert Bates was taking a break outside the Jump Start at 11th and Locust when someone came up and shot him around 9:45 p.m.

"The shooter did walk up to the store entrance where he was met by the victim," says Pottawattamie County Deputy Sgt. Dwayne Riche.

Bates managed to make it back inside and dialed 911. Officers were sent to the store because no one responded when 911 operators answered.

Bates' uncle tells Channel 6 News Bates was recently involved in some kind of an altercation at the convenience store. It bothered Bates enough to mention it, but not enough to elaborate or report it to police.

Investigators say robbery was not the motive as no cash or property is missing from the store. The gunman apparently never even went inside.

Carter Lake Police Chief Shawn Kannedy believes they've developed good leads and solid evidence. "I believe we do, we're going to do some follow-up on some stuff."

"We're just now getting around to getting something going. We've got some people to interview, people to talk to," says Kannedy.

He and the other investigators want a closer look at the surveillance tape to see if it can lead them to the killer. That tape is being reviewed by police and has not been released to the media.

Anyone with any information on the murder is encouraged to call Carter Lake Police at 347-5920.