mulvey's investigators, video camera in hand, searched the house. outside those 200-plus acres to look through. >> that area was homesteaded heavily in the 1800s. so there's a lot of laid-up wells and old foundations and things like that. >> reporter: didn't find anything? >> no, we didn't. >> reporter: not at first and not outside, but a few days later they did. >> i entered the residence through the open garage door. >> reporter: senior investigator steve andersen. >> i noticed blood stains on the floor and on the moldings of the doorway that led out to the garage. >> reporter: and there was more blood, tiny stains on a kitchen rug. they sent it out for tests. >> everything on the floor, on the inside walls and on the carpet came back to being michele's blood. >> reporter: and suddenly the case looked very different. >> then we knew we had a real problem. >> reporter: what in the world had happened to michele harris? >>> when we come back, inside the harris household. >> they have what would appear to be an idyllic life and a beautiful home and be

you can see jeremy frazier, sean mulvey, chris mccowen together at that juice bar in the video. >> mulvey was probably the most intoxicated out of everybody. so, i told him to come with me. >> did jeremy remain at your house? >> the whole night. yes, he did. >> and there was an initial meeting with the police where you told them you basically didn't remember anything. is that correct? >> yeah. that was the first time on advice from my father. >> so, was that a lie? >> in the first statement, yes. >> and then he changed his story. he then suddenly provided an alibi for jeremy frazier on the night of. it doesn't take sherlock holmes to figure out that there's something shaky about that alibi. >> reporter: but the police and prosecution were satisfied with jeremy frazier's alibi. the dna at the crime scene does not match jeremy frazier. they believe the only person at christa's home that night is chris mccowen. adding to the mystery was an incident that occurred the day before christa's body was found. >> the car was coming down here, didn't even put on brakes. >> reporter: christa's neighbo