Joe Stack, suicide age 53, by crashing his plane into the Austin Texas IRS building.
He appears to have run an IT consultancy:
www.thesmokinggun.com/archive/years/2010/0218102stack7.html
His suicide note is here, and is attracting some comment, he seemed to believe in 'The American Dream', and got pissed off about it not seeming to be what it was claimed to be:
www.talkingpointsmemo.com/documents/2010/02/message-reportedly-by-joe-stack-well-mr-big-brother-irs- man-take-my-pound-of-flesh-and-sleep-well.php?page=1
The plane would be worth $100k alone, but perhaps he had debts.