Michael Peterson says he was convicted of murdering his second wife, Kathleen, for three reasons.

“They convicted me because of blood. They convicted me because of bisexuality, junk science … and there was an awful, awful, awful lot of press coverage, and it was not favorable at all,” he tells Dr. Phil on Monday’s episode.

Peterson, who served eight years in prison but was set free in 2017, defends his innocence. In the video above, he claims his wife knew about his sexual "tendencies" and that it was not an issue in their relationship, let alone a motive for him to kill her.

On Monday, Peterson explains the mysterious circumstances surrounding Kathleen’s death, and hear about another woman whom Peterson knew who was also found dead at the bottom of a staircase. On Tuesday, hear about a bizarre theory that may hold the key to what really happened to Kathleen. Check here to see where you can watch.