. >> and at that point you can't go forward with the prosecution of douglas desilva. >> even though the report said this wasn't the person that broke into my home, i was still convinced that it was. i couldn't believe they were going to let him walk to possibly do this to somebody else. >> so kaye decided to take matters into her own hands. >> i bought a gun. i found out where he lived. i went to his house. i sat outside of his home. i wanted to go to the door and knock on the door and just ask him if he remembered me. i just wanted to take care of it myself. >> but kaye thought better of it. >> the primary reason was my son. i wanted to raise my son. i didn't want to be in jail. >> but if desilva wasn't the perpetrator, a violent sexual sadist was walking the streets and police had no new suspects. >> i will never be able to understand why a man who is innocent of a crime allowed himself to get so close to the crime and allowed himself to become so suspect. >> go back through your investigation, because then you start to doubt yourself a bit. did i miss something? did i overlook someth