The attack on Professor Rezaul Karim Siddiquee was so frenzied that its traces remain more than a month later, arcs of dried blood spattered up a pink wall and a pile of sand covering bloodstains that had pooled on the ground where the softly spoken lecturer was all but beheaded. He was killed on his way to work in the city of Rajshahi by four men who knew their target and his routines well. At least one of the killers was a former student who had a reputation for barracking the professor in class about the “immorality” of the English...