THE TRIAL
John List was tried in New Jersey in the spring of 1990. The trial began on April 1, 1990, and lasted approximately two weeks.
The prosecution’s case was, in important respects, not about whether John List had committed the killings. The fingerprint identification had already established his identity. His own admission in February 1990 had confirmed who he was. The physical evidence from the crime scene — the bodies, the letters, the investigation from 1971 — had established what had happened.
What was contested at trial was whether List bore criminal responsibility for five murders in the first degree, or whether there was a legal basis for a different verdict.
The defense attempted to introduce evidence of mental illness or diminished capacity. They argued that List’s psychological state at the time of the killings — the combination of religious obsession, financial desperation, and rigid personality — had in some way impaired his criminal responsibility.
This argument faced a significant problem: the evidence of meticulous planning. John List had not killed his family in a moment of sudden, uncontrolled violence. He had obtained a firearm permit weeks before. He had canceled deliveries. He had called the schools. He had arranged to pick his youngest child up from soccer practice. He had prepared letters explaining his actions. He had taken steps to make the photographs in the house less useful to investigators.
These actions documented systematic, advance planning. They were inconsistent with the kind of mental state that typically supports a claim of diminished responsibility in a murder trial. The prosecution argued that what the evidence showed was not a man in the grip of a mental breakdown — it was a man who had thought carefully about what he was going to do and had done it.
The jury agreed.
On April 12, 1990, John List was convicted on five counts of first-degree murder.
He was sentenced to five consecutive life terms in prison. Under New Jersey law as it existed at the time, this meant he was ineligible for parole for approximately 125 years — in practical terms, that he would spend the rest of his life in prison.
He did.
New Jersey had abolished the death penalty in 1972 — the year after the murders — and had not reinstated it. Whatever arguments might have been made about what List deserved, the sentence available under New Jersey law was life in prison. That is what he received, multiplied by five.
His conviction was subsequently upheld by the New Jersey appellate courts in 1993 when he challenged it, and remained in force for the rest of his life.