"I stand by my comments regarding the MU-2, all of them no matter the series. The MU-2 has the highest accident rate, highest fatal accident rate of any other type of turbo-prop in its class. That's a fact."
Not sure where you get your data, or what aircraft you consider in the MU-2 class, but for the period 2001-2005, the MU had a lower fatal accident rate than the Merlin, Dash 6, 7 and 8, Cessna 406, Piper Meridian and Malibu Jetprop.
Source: Robert E. Breiling and Associates