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 poses in an undated photo. She was stabbed to death near her classroom at Branham High School in San Jose in 1978, and in June 2025, ...

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

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, 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 ...

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 teacher at Branham High School in San Jose, was stabbed to death by 16-year-old Harry “Nicky” Nickerson on June 16, 1978, ...

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.