Boston Mayor Michelle Wu raised eyebrows over the weekend after she expressed condolences to the family of a knife-wielding suspect who was shot and killed by an off-duty officer after he allegedly tried to stab two people on Saturday night. The suspect, whose identity was not released by police, brandished a knife near a Chick-fil-A on Boylston Street, a busy part of the Massachusetts capital. He was fatally shot by an off-duty police officer who saw him targeting the two victims, police said.