A date rape serial killer boasted about his intellect and shared his obsession with childish films such as The Transformers in letters sent from prison.
Twisted Stephen Port – who murdered four men after meeting them on sex app Grindr – claimed he was a genius in letters from his cell.
But author Sebastian Murphy-Bates, who wrote the letters while researching his book about the serial killer, says he was obsessed with 'childish concerns.'
