Re: DNA Testing - Puzzle!
Yayyy! 
Correct answer!
The doctor is John Schneeberger. “He implanted a 15 cm Penrose drain filled with another man’s blood and anticoagulants in his arm. During tests, he tricked the laboratory technician to obtain blood sample from the place the tube was planted.”
Forensic files did an episode on him, you can watch the explaination from 17:35 min in this video: http://www.forensicfiles.com/bad-blood-2.html
Sounds like a smartass but he really is living a life of a loser after being released from prison - divorced, stripped of canadian citizenship, stripped of medical liscences and deported to South Africa to live with his mother.