A Father-Daughter Incest Case That Ended in Murder: The Haunting Story of Katie Pladl - E! Online

Katie Pladl , 20 , and her 7-month-old son were among the three people killed in North Carolina .

The victims were Katie 's adoptive father, Anthony Fusco , 56 .

Katie and Steven 's ex-wife, Alyssa , met online when she was 15 and he was 20 .

The couple had a daughter they named Denise , but put her up for adoption in 1998 .

Katie Pladl and her adoptive father were arrested in Virginia on charges of incest, adultery and contributing to the delinquency of a minor.

After she was released on bond, Katie moved back in with her adoptive parents in Dover , N.Y. , according to her uncle Cary .

On April 12 , local police said they found Katie and adoptive father shot to death in his pickup truck.

Bennett was placed in the custody of Steven 's mother.