The REAL killer is....
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
The REAL killer is Amanda, Eric's sister. She got mad at Kate because she was pregnant. Later in jail she finds out she's also pregnant and the baby's father is Neil. She asks Eric to take care of her baby.
Eric and Patrick want nothing to do with their dad because they found out he has another family, a wife and a son. He married their mother later.
Cornell finds her daughter at her apartment going through her stuff and someone behind her pulls a gun at her. You can hear shots fired and THE END.