A then-16-year-old student, who is now dead, is officially named as the killer of Diane Peterson near her Branham High School classroom nearly five decades ago.

Investigators have solved the cold case murder of a San Jose teacher stabbed to death at Branham High School nearly 50 years ago, naming a teenager who was originally suspected in the crime as the killer.

Nearly 50 years ago a young teacher was found stabbed to death inside a California high school on the first day of summer break. On Monday, cold case investigators identified her killer publicly for the first time.