A HIT-AND-RUN killer who took the lives of a mum and two children is back behind bars for spying on schoolgirls in changing rooms.

Dean Martin, 40, used his mobile phone to look at two 13-year-old girls as they changed in cubicles at Cowdenbeath Leisure Centre.

The perv put the phone in his shoe then pushed it under a partition to view the youngsters as they changed.

They spotted the phone and the police were called.

On another occasion, Martin struck a 17-year-old girl on the buttocks with a weightlifting belt in a gym.

Both incidents took place at the leisure centre in Cowdenbeath.

In 2004, Martin was jailed for 11 years after mounting a pavement in Glenrothes when drunk and high on drugs.

His car ploughed into a group returning from a dancing club. A woman and two children, aged eight and five, were killed. He then drove away and abandoned the car elsewhere in the town.

Last month, Martin, of Factory Road, Cowdenbeath, was convicted of two offences after trial at Dunfermline Sheriff Court.

He had denied that on February 25 last year, at Cowdenbeath Leisure Centre, Pit Road, he assaulted a 17-year-old female by striking her on the bottom with a weight belt.

He had also denied that on April 4 last year, at the same leisure centre, he placed his mobile phone in his shoe and placed it under the changing room partition to view two girls changing, without their consent.

Sheriff Charles Macnair found Martin guilty of the two offences.

When Martin returned to court for sentencing, the sheriff told him: “You were spying on two 13-year-old girls in the changing room.

“Leisure centres are places where members of the public should be able to go and feel safe.

“You were alone but decided to use a family-sized cubicle next to that used by the girls. The message must be made abundantly clear that voyeurism of this sort will not be tolerated.”

The sheriff jailed Martin for a year and also put him on the sex offenders’ register.

In February 2004, after a night of taking ecstasy and drinking, Martin drove through Glenrothes at speeds of up to 75mph.

He lost control of the vehicle, mounted the pavement and struck a group of women and children walking home from a Sunday-morning dance class.

Anne Martin, 39 (no relation), and her eight-year-old daughter, Ashley, were killed instantly, as was five-year-old Ross Sneddon.

His mother, Michelle Sneddon, managed to push her two-year-old daughter out of the way but was herself hit and injured seriously.

He admitted culpable homicide and was jailed for 11 years at the High Court in Edinburgh in June 2004.