Earlier quoted context omitted.
someone posted a nice story in a different thread - before he started going really crazy with the lab and stuff, it looks like he first wanted to get away from a couple of pending lawsuits in the States: "He was already facing a suit from a man who had tripped on his property in New Mexico. Another suit alleged that he was responsible for the death of someone who crashed during a lesson at a flight school McAfee had…
From memory, his nephew had passed in a similar way to the person in the flight. It may be the same case. I don't think he was running away from paying a settlement, I think he was running away from the guilt he felt that he had facilitated his own nephew's death. It was immediately after that that his downhill spiral began. Wired suggesting it was a financial move is just lowbrow journalism.
(You're roughly correct about the circumstances - his nephew was illegally piloting and crashed a plane killing himself and the passenger in McAfee's low-altitude flight program.)