In a 1976 case known as the “Cain and Abel Murders”, Jerry Allen Mark, a former Peace Corps volunteer and “hippie lawyer,” was convicted of murdering his brother Leslie Mark, Leslie’s wife, and their two children in their Iowa farmhouse. The prosecution argued that Jerry killed his family over a property dispute, citing alleged jealousy after Leslie inherited the family farm after their father passed. Authorities claimed he was nearby on the night of the murders and had purchased bullets similar to those used in the crime shortly before it happened. But no physical evidence was found that pointed to Jerry and witness statements which were withheld by the prosecution during his initial trial suggested he was miles away at the time of the murders. Nevertheless, Jerry was convicted of first-degree murder and sentenced to four consecutive life sentences without parole.
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