Dr. Phil is giving insight into the warped mind of cannibal killer Jeffrey Dahmer. His three-part special on the serial killer features a never-before-seen interview with Dahmer's father, Lionel. Dr. Phil's special comes in the wake of the Netflix series on the notorious killer, in which Lionel is shown introducing his young son to the art of taxidermy. The insinuation is that experimenting with dead animals at a vulnerable age may have triggered something in Jeffrey. | Inside Edition