here is josh markowitz. m >> reporter: take a look at thi security video, and tell me what you see. a woman walks, alone, to her car in a parking garage, in century city, california. is she in danger? same building complex, different angle. a man focuses on his cell phone, oblivious to those c around him. who is he calling? you are, in fact, watching scenes from a marriage. the final scenes, as it turns out. the woman is pamela and the man is her husband, jim. at the time this video was recorded, one of them had just minutes to live. rewind the video, to just a few minutes earlier. they have just had a meeting with their lawyers. they are in the midst of a bitter divorce. it's 6:30 p.m. the meeting is over. pamela hurries to catch the elevator, and gets off at the third floor. she walks to her car, and reaches for the keys, inside her purse. >> that's when she was attacked. >> reporter: then, los angeles prosecutor, alan t jackson, wou spend many hours scrutinizing that video. >> tell me about the attack. >>bo brutal. vicious. hea heart-stopping. pamela was completely defenseless. s