Branham High School teacher Diane Peterson was stabbed to death by a 16-year-old boy, Harry “Nicky” Nickerson, on June 16, 1978, the Santa Clara County District Attorney’s Office said.

Diane Peterson was found dead on a hallway floor near her classroom at a San Jose high school on June 16, 1978, according to the Santa Clara County District Attorney's Office.

Diane Peterson was found dead on a hallway floor near her classroom at a San Jose high school on June 16, 1978, according to the Santa Clara County District Attorney's Office.

Diane Peterson was found dead on a hallway floor near her classroom at a San Jose high school on June 16, 1978, according to the Santa Clara County District Attorney's Office.

Diane Peterson, a 25-year-old teacher at Branham High School in San Jose, was stabbed in the chest by Harry "Nicky" Nickerson, the Santa Clara County District Attorney’s Office and the San Jose ...

Decades after Diane Peterson’s 1978 killing at Branham High in San Jose, the suspect, Harry Nickerson, has been identified, Santa Clara County prosecutors say.

Diane Peterson was found dead on a hallway floor near her classroom at a San Jose high school on June 16, 1978, according to the Santa Clara County District Attorney's Office.

Decades after Diane Peterson’s 1978 killing at Branham High in San Jose, the suspect, Harry Nickerson, has been identified, Santa Clara County prosecutors say.