was with her or she would make arrangements for colby. she would never just leave. >> colby being at home without carrie led detectives vogt and toms to a grim possibility. as detectives do you have to consider that someone may have taken their own life? >> in a missing person's investigation, that is always a possibility. >> amanda gave that theory some weight. she said there was a sadness behind carrie's bubbly personality. >> i started thinking maybe she committed suicide somewhere. >> did you think carrie was capable of taking her own life? >> she seemed depressed at times. >> still, detectives needed to know more. they executed two search warrants. the first at the house carrie shared with her boyfriend justin. >> the search warrant that we prepared for justin's house included everything justin owned in justin's vehicle. >> justin's truck was checked