What a morbid thread!
Oh, well, here goes.
A woman with whom I was close friends at the time was arrested for embezzling thousands of dollars from her employer (a not-for-profit organization). It came as quite a shock to her friends, including me, as she was a caring and generous (!) person. (After the arrest and subsequent publicity, she cut all social ties. She served a couple of years in prison and was released, but I don't know what happened to her after that.)
At the party where I met my future husband, I also met another young man who interested me. Since we traveled in overlapping social circles, I used to run into him frequently, but we never had a romantic relationship. A few years ago, he was murdered in a local park.
A couple friends from high school (not all from the same school!) have passed on -- one in a car accident, another who was raped and murdered, and at least two suicides that I know of.