Yes, Vincent Crabbe did try to kill Hermione in Harry Potter and the Deathly Hallows. Harry, Ron and Hermione were trying to locate the Lost Diadem of Ravenclaw in the Room of Requirement while Draco, Crabbe and Goyle followed them in and started firing curses at them. One curse that Crabbe fired at Hermione almost hit her and it turned out to be the killing curse. This enraged Ron and he charged at Crabbe. Eventually, Crabbe would go on to duel Ron and cast the Fiendfyre, which would finally kill Crabbe himself.