Karl Bremer. His friends have posted information on Karl's Ripple in Stillwater blog. He fought but was done in by pancreatic cancer, something I understand to be one of the more awful instances of an awful killer disease. Something you do not wish on your worse enemy. I learned of Karl's death from reading Dump Bachmann's notice.
The Book. Avidor, Young and Bremer collaborated in writing it. I never personally met Karl, but I will miss his voice. The Blog, Karl's alone. Read some of it if you have not already.
__________UPDATE_________
This about Karl, from a link here, one item from earlier, the linking one from around the time Karl was diagnosed with cancer.