federico calderon: she has kids. she has a family that lives in rio bravo, which is a municipalit just south of laredo. craig melvin: law enforcement knew melissa as a drug user and sex worker. to her family, she was something else entirely. every time we would hang out with each other, we would just laugh. it was very fun to be around with her. craig melvin: gracie ramirez was melissa's sister-in-law. ciara ramirez: we were like sisters. we were super close to each other. craig melvin: melissa's mom likes to remember her daughter as she was. [speaking spanish] translator: she got good grades. i never struggled with her. i never had problems with her. craig melvin: that was before her early teens, before a bipolar diagnosis that went untreated. gracie says melissa never let on to her family that she turned to drugs and then sex work. she really kept her life split in two, didn't she? she was very private to her life. craig melvin: still, when melissa would leave for days at a time, her family knew it couldn't be for