It's a segment from one of the earlier seasons of UM. I haven't seen it in a very long time and I only remember a few details about it. It was an unsolved murder case where a man was stabbed to death. I don't remember exactly what year it happened, but I know it occurred in San Francisco. The victim was a Chinese man, but I don't recall his name. On the night he was killed, he and a female companion left his job early in the evening. He was driving a red van. He didn't know that one of the back windows of the van had been broken. He drove about 100 feet and suddenly two unknown men emerged from the back, one of them pulled a knife, and they demanded money from him, lots of money. They assumed he was a pretty wealthy guy, but in reality, he wasn't. He got into a struggle with the guy who had the knife. The guy stabbed him in the heart, and he died almost instantly. The two men then fled the scene. The female companion, who was not harmed, feared the men would be back and she hid on the floorboard of the van for a few hours before notifying the police. She didn't get a good look at the men because it was dark and the only solid clue left behind was the murder weapon. I also recall seeing in the segment that the S.F. police department was talking to a class of either high school or college students about the case and trying to get the students' personal opinions on it. I would greatly appreciate it if someone could help me identify this segment because it is really bugging me. What was the victim's name and was it ever solved?

The victim's name was Jim Fang. I believe a detective working the case at the time was teaching a criminology class at a college and gave the students information about the case to see what they could come up with it. It was from one of the later seasons. Probably season 6 or 7. It's not a segment I have re-visited often, so you probably know more than I do. Maybe someone else will post some more information.