It was the case where the manager and employees were robbed and the manager was shot while working at McDonald's? Happened near richmond va. A friend used to live near it and we actually ate at that location around that time in the early 90s way back so I always think about that case. Last time I looked it up looks like the manager passed in 2009 in his 40s.

It's excluded from Prime. You can find it in the missing case segment thread for Season 5.
https://unsolvedmysteries.fandom.com/wiki/Michael_Anthony_Starr