2007, 15 years after cathy torrez had breathed her last. >> i was having coffee. it was before work and i was reading my bible. it was a little bit after 7:00 when i saw that i had a call from him. >> from darren wyatt. mary knew he was scheduled to meet with the d.a. >> my first thought was he was going to tell me that the meeting was canceled again. >> but that was not the message. not at all. >> he said i'm standing here in front of sam's house and we are making an arrest right now. >> and you thought? >> i got up and i think i screamed there at the mcdonald's. >> years before, darren wyatt had made a promise. now he felt he was keeping it. >> that had to feel pretty good. tears of joy this time. >> sam lopez was arrested and charged with cathy's murder. but he wasn't alone. just as prosecutors now believed