NEW YORK -- He has a criminal career that has spanned more than 20 years and featured colorful aliases, including John Handsome. He once robbed a bank of more than $60,000 -- during a blizzard. A parole board later labeled him a menace to society. Still, until this week, 41-year-old Darryl Littlejohn was a faceless ex-con getting by as a bouncer. That changed when authorities targeted the parolee in the brutal slaying of a graduate student from Boston who mysteriously vanished after last call at the SoHo bar where he worked. Littlejohn has not been charged in the murder of...