Bad Blood (S06E18)

The case of John Schneeberger is related. The Saskatchewan doctor was accused of sexually assaulting female patients. Although initial DNA tests cleared him, he later admitted to circumventing the testing by inserting a plastic tube filled with another man's blood into his arm. It was a private detective, hired by one of Schneeberger's patients seven years later, who uncovered the ruse. (TruTV)