Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: A police officer who raped a young girl he met on duty was being investigated for sex offences before he joined the force. How did he slip through the net?

Ian Naude: How predatory paedophile joined police