stevie green's rape, investigators feared he would strike again. >> as the investigation went 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 devil mask on and run up and told my boyfriend to turn and not 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. cussing me out.