For decades, an alternate suspect has been the center of scrutiny in the murder of Earl O’Byrne. The PROOF team uncovers a connection between this suspect and a key piece of evidence that was never fully investigated. Meanwhile, Scott Baldwin is approached by a fellow inmate who begins asking too many questions not only about his case, but other cold cases as well — including one of Kalamazoo’s most horrific crimes: the Polderman murders.

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