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Louise began speaking online to an older man when she was 13. He began to groom her and attempted to persuade her to visit him in person.

When her mother Amy alerted the police, she was astonished to be told it would take six months before forensic examination of her daughter's laptop and phone could begin.

"I was horrified, because what could they be doing in the six months?" she said. The family eventually waited 10 months for police to examine the evidence.

The police force involved say the number of investigations being dealt with by the high-tech crime unit has risen by more than 40% over the past four years. They have now invested in additional staff and are now reviewing this particular case.

This clip comes from 5 live Investigates on 8 November 2015.