Gary C. "Gar" Samuelson was the original drummer for Megadeth from 1984-1987. Gary was dismissed from the band for substance abuse problems which would continue to plague him until his untimely death in 1999, reportedly due to liver failure.
Gar Samuelson's fusion drumming style can be heard on Megadeth's debut album "Killing Is My Business... And Business Is Good!" as well as Megadeth's breakthrough album "Peace Sells... But Who's Buying?"
Rest in peace, Gary Samuelson.