A law abiding businessman turns criminal after medical treatment. Are hormones to blame?

Richard Davis was a 42 year old asexual with a highly successful business and no criminal record. Then he experienced a sudden change of personality. He became sex-obsessed - buying pornography and hiring escorts. Within two years of this personality change, he had convictions for assault and dishonesty and was banned from being a company director.

Journalist Amber Haque digs into the newspaper and court archives to tell this extraordinary story. Criminal psychologist Dr Julia Shaw explains why, in this case, the defence "My hormones made me do it," might be more than a lame excuse.

Producer: Maggie Latham with help from Shabnam Grewal and James Shield