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Though Marty never actually signed a confession document, he was eventually charged with double murder. He took the stand in court and insisted he was innocent, saying he was tricked by detectives into confessing. "They were saying my father said I did this," he said on the stand. "My father never lied to me. They had me believing that I did it—and that's what they wanted to hear." Adding insult to injury, Marty was forced to attend his mother's funeral during his trial, bound by shackles.
Marty was ultimately found guilty and sentenced to 50 years to life in prison.