school did the same thing. they just looked for the one morning by scott's car alarm. computer record of the key card being used and they pulled up scott went to investigate. >> and while he's out front he the security video from that hears his mother screaming. he goes inside. giselle is inside of his house. she's inside his room tampering moment and that place, and with his computer. >> reporter: sound familiar? it was the same thing esteban voila, there was their thief. was doing at the nursing school. >> and when was this vis-a-vis >> so i had him -- had them send the murder? >> four days before, on the tuesday. me the still photographs. >> reporter: but there was something else. and when i looked at it, i a piece of evidence you have to hear to believe. immediately identified that it scott told the detectives that was giselle esteban. four months before michelle's >> reporter: the picture was dated may 26th, one day before michelle le disappeared. so what else did she do that disappearance giselle harangued day? and threatened him. verbal attacks so alarming, he ritchie got a subpoena for all the school's security camera footage from may 26th. recorded some on his iphone just in case something bad ever happened. what he saw on those videos was this one in scott's car, their small daughter sitting in the both strange and disturbing. back seat listening. you listen closely. you're about to hear the real and moved giselle esteban to the giselle esteban. >> i asked you can we just be top of the list of persons of interest. honest about michelle because she's the one issue that i really, really am having a hard >> coming up -- the strange time dealing with. >> that's not what you said. video trail of giselle esteban >> yes. >> we didn't talk for days. the day michelle disappeared? >> okay. starting from now, we are going to be honest about michelle. >> it shows her walking around do you understand me? whether you sleep with her,