Is Michael Peterson an unlucky man or a murderer walking free?

On December 9, 2001, Peterson called 911 reporting that his wife, Kathleen, appeared to have fallen down the stairs and was barely alive. A few weeks after her death, Peterson was indicted and charged with her murder. During the trial, prosecutors tried to convince the jury that Peterson killed his wife with a blow-poke – a fireplace tool - possibly for insurance money and because she had discovered his secret bisexuality.

This wasn’t the first time a woman whom Peterson knew was found dead at the bottom of a staircase.

In the video above from Monday’s episode of Dr. Phil, hear what happened in Germany in 1985. And, hear why Peterson, who was initially found guilty of murdering Kathleen and spent eight years in prison, was set free in 2017. Plus, see a preview of The Staircase, a documentary that followed him during his trial which was recently re-released on Netflix.

On Monday, Peterson explains the mysterious circumstances surrounding Kathleen’s death. And 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.