The BTK Killer — The Man Who Mailed In Self-Incriminating Evidence

Dennis Rader was upset that the police lied to him.

By El Dorado Police Department — Dennis Rader from EDPD photographic records.

Picture this: a serial killer manages to get away with more than half a dozen murders over the course of 3-4 years and leaves investigators baffled and clueless.

However, he isn’t happy with the fact that no one's giving him credit for these…