so was, then assistant da prosecutor, butch ford.how she did it, or when she did, or where she is-- or, more important, what she did with the body. if you don't have a body, it makes the case more difficult. keith morrison: and so, ritchie and the other investigators with the hayward pd continue the tedious work of building a murder case without a body. they ran fingerprints, they sent dna out for testing, they interviewed witnesses-- all quietly, out of sight of the family and press. they tested a strand of hair found in michelle's car-- it turned out to be giselle's. some of her touch dna on the turn signal too. but since the two knew each other, that wasn't enough evidence to make an arrest. so they checked giselle's cell phone records-- found that her phone, like michelle's, left a trail in the hours after michelle vanished. and what do you know? the location that michelle's phone went, giselle's phone also went. as if they were traveling together. yes. keith morrison: the eavesdropping electronics was closing in. here was survei