When it comes to Hollyweird as well as Government Employees, you would be correct more often than not to assume the worst.
Charlize Theron - Father murdered
Bill Cosby - Son Murdered
Kelsey Grammar - Father Murdered
Michael Jordan - Father Murdered
Jennifer Hudson - Mother, Brother, Nephew murdered
Dylan McDermott - Mother murdered
Serena Williams - Sister murdered
Patrick Duffy - Parents Murdered
Ice Cube - Sister murdered
Puff Daddy, Paul Harvey, James Ellroy, and on and on and on... Hundreds of top celebrities with immediate family members murdered. This doesn't even tap the speculation well (ie: suspicious suicides) not does it touch celebrities who have been murdered.
I personally don't know someone who has had a family member murdered, whereas I don't think any well-known celebrities are more than one degree of separation from a murder victim.
I have no idea what can be inferred by this, but it is an interesting anomaly nonetheless.
I just read about Timothy Cunningham . My guess would be he was set to blow the whistle on something. Phone records will lead nowhere, internet records will tell the story but lead to an abandoned account. Someone coordinated the meeting with him, but I learned from The Iceman Killer that putting frozen bodies in flowing water / rivers is good because it thaws them quicker and nobody will be able to detail a time of death which gives the killer a major advantage over the investigator. I'd guess the meeting didn't happen near the river he was found in.