casandra waller: i was so excited about taylor moving. in a monogamous relationship. it was like, yeah, this is-- this is it. keith morrison (voiceover): except maybe it wasn't. casandra went over it and over it. what happened that last day? taylor gave me a hug and a kiss, and i said, well, you guys have a good day. keith morrison (voiceover): that's what taylor and her friend ashley went off to do their errands. ashley was one of taylor's, like, number one friends. and they both were in law enforcement before. they were close friends. keith morrison (voiceover): everybody seemed happy, nothing amiss. but later that day, said casandra, the mood got heavy, uncertain. casandra waller: it was probably about 5:00. i'm starting to get a little frustrated. i text taylor, and i get nothing, and call taylor, and i get nothing. keith morrison (voiceover): and when she texted ashley an hour or two later, where was taylor, she was shocked at the answer. this was probably 6:00, maybe 7 o'clock at night. she goes, what do you mean she's not home? keit