I can't imagine what M.Lapierre's mother is going through at the moment - this so soon after losing her husband.
I don't know much about the MU-2B, so I did a little research on faa.gov, and what I found there is a bit alarming. For example, Rep. Tom Tancredo (R-CO)
wrote to the FAA, asking them to ground the MU-2B after a fatal crash near Denver in 2004. He says the plane has a poor reputation (with a bad nickname), and refers to NTSB stats and airworthiness directives about it. The FAA issued SFAR 108 in 2005, requiring pilots to have a type rating on the MU-2, and as of 2010 the results
appear to have been positive.