I was thinking of Hariri
http://www.msnbc.msn.com/id/6967302/
What did the "investigation" ultimately show?
I knew there was a more recent assassination, but I couldn't remember what position it was in.
Hariri definitely became anti-Syrian, especially after Assad's father passed on and policies and such began to change. But he wasn't the last PM, either. Three have been two others before the current guy.
Politics in Lebanon is a balancing act, because the stakes are high, and have been since at least the 80s.