>> we'd been drinking that night. she started yelling at me. >> k.c. said it was all just a drunken misunderstanding. >> i don't like you, i'm not attracted to you. i said, maribel, we had a great time tonight. what's the problem? >> what was the problem? detective ramirez heard from maribel's family something very interesting. k.c. joy had wanted to be more than just roommates with maribel ramos. lucy told us the same thing. when did it become apparent to you that k.c. sort of had a crush on your sister? >> he called me, and then he just said, i'm like in love with your sister. so i was like, oh, this is great. >> because you knew your sister wasn't in love with him. >> yes. and that's a bad situation. so at that point i'm like, okay, k.c., you know, you're a good man and i'm sure you'll find somebody out there for you, but -- >> but it's not going to be her.