>> reporter: long as he could remember, max farver believed he knew his mom, cari as well as anybody possibly could. >> we were definitely really close. i was her second opinion on most things. >> reporter: so when cari was a no show at the wedding, max knew something was way off. >> i wasn't sure what was going on but that i just knew something was wrong. >> i could just feel it in my bones. there was something-- something wasn't right here. >> reporter: nancy didn't tell her grandson about the truly disturbing text she'd received from cari. this one didn't say anything about a new job. instead, cari texted she broke up with her boyfriend...and was thinking about checking into a mental hospital. >> reporter: that'd scare you? >> yes. it scared me tremendously. >> reporter: by 'boyfriend' did she mean this mysterious dave? >> reporter: did you know how to reach this guy? >> no. i didn't.