Clay Martin Croker, often billed/credited as C. Martin Croker, has passed away at the age of 54. He was known best for being the animation director for Space Ghost: Coast to Coast on Adult Swim, and voicing the roles of Zorak and Moltar on the same show. He also reprised those roles in later appearances and shows, and voiced Dr. Weird and Assistant Steve in the Aqua Teen Hunger Force franchise.

There's no information as to the cause of death, rumors have circulated that Space Ghost may have been involved.

Source: http://www.avclub.com/article/rip-cl...and-voi-242772