As American Crime Story concludes, we’re joined by Darren Criss – the former Glee actor behind the role of Gianni Versace's murderer Andrew Cunanan. We discuss his preparation for the part – what he knew about the case and what he was surprised learn. And we find out more about the ascent and descent of a killer who, crucially, could have taken a very different path. i-D Arts and Culture Editor Matthew Whitehouse presents.