Kerri Rawson sees her life in two parts: before and after she learned that her father was a serial killer. The before included camping and fishing vacations as a family; helping her father build a treehouse and working alongside him in the garden; going to church every Sunday. Ms. Rawson was 26. After years of therapy, Ms. Rawson, 45, is offering intimate details about Mr. Rader’s life to investigators who asked for her help solving cold cases that may involve her father. Her contributions in recent months have helped investigators identify him as the prime suspect in two unsolved cold cases: a missing person investigation and a murder.

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Persons: Kerri Rawson, Ms, Rawson, Dennis Rader, B.T.K