'He was plagued with these fantasies, with these thoughts, about wanting to harm, and subjugate, and even murder women.' Dr Fred Berlin is an American psychiatrist and sexologist specializing in sex offences. Dr Berlin has been an attending psychiatrist at Johns Hopkins Hospital in Baltimore since 1978, where he also founded the 'Sexual Disorders Clinic'. He has appeared as an expert witness in numerous high-profile trials, including that of Jeffrey Dahmer. Dr Berlin testified for Ross at trial, and also supported him through his attempts to bring forward his death penalty. Get in touch on social media by searching for Crime+Investigation and using #MakingAMonster, and leave your thoughts in the review section of your podcast app. Making a Monster: The Tapes features interviews recorded by Monster Films for the Crime+Investigation TV series, and was hosted by Cherry Healey, produced by Sam Pearson and Chloe Frost, with editing by Joel Porter.