. >> texas equusearch founder tim miller will go to ft. looking for missing soldier vanessa guillen. >> tim locally is kind of a legend in terms of finding people. >> texas equusearch was founded in 2000 by tim miller, not long after his daughter had been brutally murdered. he decided that maybe he could help other people since he understands what it's like to have a child go missing. >> we did some searching and mapping areas out and stuff that day. >> the search for missing ft. hood solider vanessa guillen continues. the reward for information on her whereabouts has now doubled to $50,000. >> i started looking for legal help. i had a hard time finding a lawyer that would take the case. thankfully, i found natalie. >> natalie khawam, with the brought into the equation.ts - and that puts them on another level. >> mayra contacted me and said, i heard you do a lot of things for the military. would you be able to help my family? i said absolutely. i said, you don't have to pay me anything. >> it gets to the point where it's not just on local

investigators look for evidence, they enlisted the help of a search and rescue nonprofit called texas equusearch, desperate for answers, reached out to their congressman, sylvia garcia. >> i told them i would call ft. hood and set up a virtual phone call with the colonel. >> reporter: on that call, mom gloria related a stunning conversation she'd had with her daughter. >> she told her family she was being sexually harassed, but she didn't report it out of fear of retaliation and retribution. and because you're reporting that harassment basically up the chain of command, in the end, whether someone is prosecuted or not is up to the unit commander. >> reporter: vanessa's family reached out to attorney natalie kwam who took the days pro bono. >> i was told he followed her into a shower, and another person harassed her. >> reporter: the story went viral, with celebrities like salma hyatt tweeting about her disappearance. it empowered military service members to come forward with their stories about sexual harassment and assault within the military. the search of specialist robinson's phone finds tha