Ashton Kitchen-White was preparing to go to university to study medicine when the collision happened on Ring Road Beeston Park, Middleton, on May 16 this year.
He was hit by a speeding Ford Focus ST driven by Regan Kemp, 26, who then got out of the car and ran away from the scene.
Detectives from West Yorkshire Police’s Major Collision Enquiry Team launched an investigation and established the Ford Focus had travelled from Scotland to Leeds earlier that day.
A video recorded on a mobile phone inside the car showed Kemp speeding up moments before the collision, with a passenger heard commenting ‘that’s crazy fast’.
CCTV then showed Kemp abandoning the car and running away, before getting into another car minutes later with his friends and driving back to Scotland.
He then made his way back down to his home in Lafrowda Close, Penzance, Cornwall, and detectives carried out extensive enquiries at both ends of the country before Kemp then handed himself in.
He was arrested four days later on May 20.
On Thursday, Kemp was found guilty of causing death by dangerous driving following a trial at Leeds Crown Court and was sentenced to 15 years and six months behind bars.
He was also banned from driving for 17 years and two months.