. >> reporter: carrie's ex, tim mcvay, was in las vegas on vacation was told she was missi. riends. tim said he wanted to hel he talked to carrie's fa dave about where to lo. >> tim told him, h be at my place. go over and look. there's a window open. you can crawl into the and search the house. >> reporter: dave went? >> yes. >> he did. >> reporter: through the window, did he see anyth >> nope. >> reporter: no carrie no carrie anywhere. and one thing left beh house was a sure sign was terribly wrong, heve dog kolby. >> her everything was just like a little kid. and if she did go somewhere, kolby was either with she would make arran kolby. there was -- she would just leave. >> reporter: kolby bei without carrie led det voy and thomas to a possibility. as detectives, do you have to consider that someone mi >> in a missing persons investigation, that's possibility. >> reporter: amanda ga theory some weight. she said there was a sad behind carrie's bubbly personality. >> i started thinking she committed suicide >> reporter: did you think carrie was capable of ta >> well, she seem