Harry 'Nicky' Nickerson has been identified as the killer of Diane Peterson, a teacher fatally stabbed in 1978. The Cold Case Unit's renewed investigation led to this conclusion after a family member's confession linked Nickerson, who died by suicide in 1993, to the murder. Peterson was found dead just after the school year ended. Initially, a witness provided a sketch resembling Nickerson but later retracted the accusation. Despite Nickerson's past run-ins with law enforcement, he was never charged for the murder during his lifetime.
This marks the end of a terrible and tragic mystery. Ms. Peterson would have been a senior citizen today if she had not crossed paths with this violent teenager.
Nickerson also drew suspicion on himself about a month after the killing, when he was arrested in San Jose for an unrelated matter.
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