On 25 August 2012 Sampson was convicted of raping a girl he met at a nightclub in London in February 2010. The girl was taken unwell after accepting a drink from a stranger, and Sampson and a friend offered to take her home. Sampson told one of the girl’s friends that he was a medical expert. He later raped the girl at her flat while she was incapacitated.

Sampson was also convicted of stealing her mobile phone, plus her flatmate’s laptop and games console.