‘I stared into the abyss of evil’: What Joe Berlinger learnt when making Netflix’s new Jeffrey Dahmer documentary

I literally stared into the abyss of evil and saw things most people shouldn’t see.” So Joe Berlinger, the director behind Netflix’s new Jeffrey Dahmer documentary, tells me over Zoom one sunny autumn afternoon. He is bespectacled with a grey beard and an avuncular whiff of Mandy Patinkin about him.