into the fifth week and we heard nothing more about any suspects being arrested or charged or identified, it became an idea that maybe this was going to be an unsolved crime. >> then, five weeks later, 15-year-old vanessa rocha and her 16-year-old boyfriend were in a secluded area of godard park in downtown texas city. >> we went out there on many occasions and never had anything to worry about. >> a man walked up rapidly to the couple. >> we looked up and saw a man with a desk mask and ran up and told my boyfriend to turn and not to look at him. >> the man pulled a gun on vanessa's boyfriend and ordered her to undress. >> he was calling me every name in the book. he started to choke me. i couldn't breathe. i was just gasping for air until he finally stopped.