After nearly half a century, the murder that shook the San Jose community has finally found closure. The Santa Clara County District Attorney's Office, working in tandem with the San Jose Police Department, has resolved the 1978 murder case of Diane Peterson, a young high school teacher whose life was cut short in a brutal stabbing at Branham High School. According to the Santa Clara County District Attorney’s Office, Harry "Nicky" Nickerson, who was 16 at the time of the crime, was named as the perpetrator, supported by a recent confession he made to a family member.
This year, the missing pieces began to fit, for the case had been cold for decades, and investigators stayed determined, chasing leads and testimonies. A witness had previously recalled Nickerson's admission coupled with a sighting of a knife etched with "Teacher Dear," however, without further evidence, police couldn't solidify the claim. Notably, District Attorney Jeff Rosen said, "This marks the end of a terrible and tragic mystery," lamenting the violent path Nickerson and Peterson's lives converged on, a sentiment he expressed, per the Santa Clara County District Attorney’s Office.
Tracing back the chilling events, Diane Peterson was found slain near her classroom on June 16, 1978, just as summer recess commenced. Nickerson had been on the radar since a 1978 booking photo bore an uncanny resemblance to a composite based on eyewitness descriptions of the assault. While DNA efforts by the DA's Crime Lab between 2023 and 2024 were fruitless, the recent breakthrough came through a conversation with one of Nickerson's relatives. They admitted to investigators that Nickerson had come to their home right after the incident, confessed to the crime. The news of Nickerson's confession was further echoed by San Jose Police Chief Paul Joseph, who declared, "We hope this resolution brings a measure of peace to the victim’s loved ones and to a community that has carried this loss for far too long," in his message shared by the DA's office.
