Heavner was driving an icy road on Friday afternoon in Catawba County, northwest of Charlotte, when he encountered a vehicle that had spun out, officials said.

When Heavner and two other people pulled over to help, they found that the driver, Marvin Lee, was “allegedly under the influence of either drugs or alcohol and was not cooperating,” Sheriff Coy Reid told NBC News on Friday.

When the group decided to call the police, Lee overheard them talking.

“He got out of the car and started shooting,” Reid said. “The three people took off running, but the gunman hit one of the individuals. He then approached the victim, stood over [him] and fired multiple shots.”

Heavner was pronounced dead at the scene. Lee refused to leave his car until a tactical team, which included an armored vehicle, arrived at the scene, Reid said.