Ex-Hoya Smith guilty of vehicular homicide Former Boston Celtics guard Charles Smith was convicted yesterday of vehicular homicide and leaving the scene of a crime in the hit-and-run deaths of two Boston University students, and was sentenced to 4 1/2 years in prison. He was acquitted of manslaughter. Smith, 24, a former Georgetown standout, had been charged in the deaths of Michelle Dartley, 20, of Ridgewood, N.J., and An Trinh, 21, of Placentia, Calif. They were struck on a Boston thoroughfare March 22, 1991. Smith has been playing in the Global Basketball League. College gymnastics Seniors Wendy Weaver, who broke her all-around record last week with a 39.0, Julie Heilman and Leslie Robinson will be honored when No. 12 Towson State (15-2) closes its home season against Pittsburgh at the Towson Center at 7 p.m. tonight. Bowling Parker Bohn III leads through four rounds of the PBA Tour $150,000 Johnny Petraglia Open in North Brunswick, N.J., with 6,175 pins. Glen Shipe of Owings Mills is 15th with 5,913 pins. Local players who cashed: Mark Bowers of Aberdeen, tied for 36th, $1,085; Martin Letscher of Bel Air, 42nd, $1,030; and Danny Wiseman of Dundalk, 49th, $960.