Mahopac High School mourns 19-year-old student David Diachenko, killed in crash at the school
Grief counselors are on hand at Mahopac High School to support students and staff members after a recent graduate was killed in a car crash at the school.
David Diachenko, 19, was killed after his 1990 BMW went over a fence and crashed into a wall in the school's science wing late Friday night. Three classrooms were damaged in the crash.
Diachenko had graduated from the high school...