Opera in particular has a threshold problem: People think they need to be highly cultured and speak several languages to go.

WSJ: A Potent Biblical Bargain, Undermined | Clemency | Boston Lyric Opera | By Heidi Waleson

The problem with categorising Mijailovic is that he was "a threshold case", Sten Levander, a forensic psychiatry professor from Malmo University Hospital, told BBC News Online.

BBC: NEWS | Europe | Doctors split over mind of a killer