did he ever meet any of the victims, I wonder?

Well for those of you that aren't aware of it, Lifetime's website has an interesting interview with RS where they ask him some questions about UM. I really enjoyed watching it as we don't often get to hear what he thought of the show. Here is the link:

http://www.lifetimetv.com/shows/unsolved/video/index.html

I haven't watched that for a while but I remember either in this or another interview RS talking about how he had met Mickey Thompson's sister and had became friends with her and kept in touch which I found interesting. That is a good question though, I also wonder how many of the families he has met.

did he ever meet any of the victims, I wonder?

I can confirm only one case: Jennifer Pratt. She was the teenager who got hit with a board by a truck load of kids, and sustained permanent brain damage. Stack appeared on camera with her and her folks for the 3rd anniversary edition of the show, which aired in early 1990 (the segment of his meeting with the Pratt family was never rerun on Lifetime).

Whether or not he ever met any other victims or their families, only those close to him would most likely know for sure. But the fact that he would meet such people is something you don't usually see other Hollywood celebrities do (at least, not the Hollywood celebrities of today). But to do that even just once is commendable. ;)

I know James Ellroy got to speak to him. He's the author who had his mother murdered when he was only ten years old in the town of El Monte, California. In his book about the case {"My Dark Places"} he mentions speaking to RS and getting a real kick out of it. When he was struggling during the 1970s, Ellroy often caddied for RS at Bel Air Country Club.

The Circleille Letter writer case UM got involved personally since the letter writer mailed a letter to the show stating, "Forget Circleville, Ohio......" I don't know if Stack met with anyone from Circleville, though.