and thank god he shows up on that night, because that narrows the timeline, that preserves the crime scene at that point, and that prevents wilson saintil from coming back and cleaning up the crime scene. >> when we found out later it was him, the feeling that he had the nerve to come to our home to see -- it's still hard to comprehend that. >> wilson saintil was tried and convicted of first-degree murder. he was sentenced to life in prison without the possibility of parole. saintil left evidence behind, some he might have explained, having worked there as an employee. but not all of it. >> i think forensic science is amazing. that's what solved the case. it just puts that much more of my faith in the system. i'm glad it's progressed to where it has and i hope it