“Oh my God. What should I do? Should I yell at him? ... He just shot her. He just shot her,” Weber said.

A second shot, which apparently struck the road, was drowned out by Weber, said Buchanan County Attorney Shawn Harden, who reviewed the case.

Then there was a third gunshot, the final one where Roses turned the 9mm handgun on himself.

“Oh my God. He’s down. I think he shot himself,” Weber tells the operator.

Investigators with the Iowa Division of Criminal Investigation later traced the weapon, a Ruger P89. They discovered the gun had changed hands a few times since it was originally purchased, Harden said.

About two years ago, Roses bought the pistol from a coworker, Harden said.

Harden said the Iowa DCI agent who investigated the murder/suicide referred the case to the U.S. Attorney’s Office and the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives.

He said the sale took place in Black Hawk County, and although Roses didn’t have any convictions that barred him from possessing firearms, it is against federal law to sell or transfer a gun to a person who resides in another state unless the seller is a licensed dealer.