The National Transportation Safety Board is out with the results of its investigation into the accident that claimed the life of Scott Crossfeld.
"The pilot's failure to obtain updated en route weather information, which resulted in his continued instrument flight into a widespread area of severe convective activity, and the air traffic controller's failure to provide adverse weather avoidance assistance, as required by Federal Aviation Administration directives, both of which led to the airplane's encounter with a severe thunderstorm and subsequent loss of control."
Keep in mind, this is one of the greatest pilots that ever climbed into an airplane, and he died because of something he did (despite the attempt to shift blame to the controller). If it can happen to him...
Read the report.