Deborah and her half-sister, April, learned three years ago that Deborah’s father and April’s stepfather, Robert Brashers – whom they say was an engaged and loving father -- was leading a double life while raising them. Brashers, who shot himself in 1999, was responsible for a string of killings, sexual assaults and burglaries between 1985 and 1998.
 
Now, the sisters say they are struggling to understand how a man they loved so much could also be a serial killer. And, Deborah says she wonders if her DNA could make her susceptible to do bad things.
 

“You can’t shed the skin you grew up in, and there’s no reason that you should. You two have done nothing wrong. You two are victims of a psychopathic killer,” Dr. Phil tells the women. “You have to give yourselves permission to say: ‘I was betrayed. I was deceived. I was a child. I have no responsibility for that.’”
 
Hear more of Dr. Phil’s advice in the video above.
 
This episode, "'My Father Was a Serial Killer,’” airs Friday. Check local listings to see where you can watch.

WATCH: ‘This Particular Case Just Never Leaves Me,’ Genetic Investigator Says About Robert Brashers’ Case

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