Whilst living in West Molesey, Surrey, Barker became close friends with teenager Jessica Sayers and another teenage girl. She then created three fictional teenage male identities online and used these identities to befriend Sayers and the other victim and establish physical relationships. Barker was eventually arrested in the persona of "Aaron" for committing sexual assault on Sayers, but her physical sex and identity were not confirmed until she was asked to change clothes.