LOUISVILLE, Ky. (WDRB) – Christopher Lee McCullum bought a handgun a week before he was charged with murder in connection to a fatal shooting on I-71 southbound in February and may have been “mentally unstable” at the time, his employer told police.

Greg Cheers, who owns Cheers Electric, also told police that McCullum, one of his employees, was “more than capable” of being involved in the road rage shooting in which 41-year-old Mukhtar Ahmad was shot and killed as he was driving along I-71 on Feb. 25.

In addition, McCullum's estranged wife told police he had a “history of mental illness,” according to records recently released in McCullum's murder case.

The records released last week include statements from witnesses who saw the shooting or aftermath, people who know McCullum and a description of how police caught McCullum on I-64 eastbound on the Blankenbaker Parkway ramp.

McCullum has pleaded not guilty to charges of murder and wanton endangerment.

After the shooting, police went to the home of McCullum's estranged wife, who said she had just talked to McCullum and was on the way to pick him up. She told police someone had called and told her McCullum had shot a person.

There is no indication in the record of what McCullum told his estranged wife. Also, there is no police interview of McCullum in the court records.

After the Feb. 25 shooting, police tracked McCullum through his cell phone and took him into custody without incident.

A witness who said he saw the shooting told police he was traveling southbound on I-71 when he noticed the driver of a white van yell at the driver of a black vehicle and then veer towards that car.

Bruno Azevedo said the man in the white van stuck a gun out his window and fired multiple shots at the other vehicle. The black vehicle continued driving and the white van pulled up alongside and fired a second round of gunshots, Azvedo told police, according to a summary of his interview.

After the second round of shooting, the black vehicle drove slowly into the median and hit a railing, Azvedo said.

Ahmad was pronounced dead at the scene of a single gunshot wound to his right side. His vehicle, a black Lexus SUV, had several bullet holes in it.

and was recently arrested while carrying four loaded handguns, two rifles and a crossbow.

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