From the Aspen Comics forum:
Unfortunately it's with great sadness that I must inform everyone that Michael Turner tragically passed away last night, June 27th at approximately 10:42 pm in Santa Monica, Ca. Turner had been dealing with recent health complications arisen in the past few weeks. More details concerning Turner's passing, and services, will be given shortly.
Anyone wishing to send their condolences to Michael Turner's family is encouraged to send to:
Aspen MLT, Inc.
C/O Michael Turner
5855 Green Valley Circle, Suite 111
Culver City, CA, 90230
Aspen also encourages anyone wishing to make a charitable donation to please send to Michael Turner's requested charities:
The American Cancer Society or The Make-A-Wish Foundation