Sentencing Jones to 10 years in prison, Judge Jeremy Jenkins said his actions were “deliberate and dangerous” and “inhuman and self centred”.
“With self preservation in mind, you took a bag from the vehicle and with no regard for Ms Mabbitt, you ran away,” he said.
“You have shown not the slightest remorse or contrition.”
Jones was also disqualified from driving for 10 years.
One CCTV clip played in court showed Jones “walk over to where Ms Mabbitt is, appear to lean over and check her, before walking away”, said Ms Jackson.
The court heard how a member of the public saw Ms Mabbitt lying on the side of the road, 27m (89ft) from the car, with “serious” injuries, and performed CPR.
She was taken to the University Hospital of Wales in Cardiff where she was assessed as having an “extensive head injury”.
By 11 April her condition deteriorated and she died at 11:20 BST the following day.
