Frank Mullen has retired from Suffocation

http://www.ghostcultmag.com/frank-mullen-announces-his-retirement-from-suffocation/

Best of wishes to him in his future endeavors. Although it will be strange hearing a Suffocation album without him, if they choose to make one.

He hasn't been with the band "full time" in awhile. So it's not a shock that he has decided to step down.

I read that he was planning to months ago. At the time they were just using his voice for studio recording but intended to have another guy for live shows.