Who is Joseph Andrew Stack?

(MYFOX NATIONAL) - Joseph Andrew Stack is the name of the pilot who allegedly flew a small plane into a seven-story office building in Austin, Texas Thursday.

A possible suicide note has been found on the Web site EmbeddedArt.com . It appears to belong to  Stack.

The last line of the rant states "I saw it written once that the definition of insanity is repeating the same process over and over and expecting the outcome to suddenly be different. I am finally ready to stop this insanity. Well, Mr. Big Brother IRS man, let’s try something different; take my pound of flesh and sleep well."

The domain name is registered to a Joe Stack.

NTSB sources told Fox News that they are investigating theis as an intentional act. They believe Stack may have set his house on fire earlier in the day, then took flight in the plane and crashed it into the downtown Austin building.

Stack's daughter reportedly told authorities that her father set the home on fire.

MyFox Austin reported that Austin firefighters responded to a house fire in the 1800 block of Dapplegrey Lane. Upon arrival firefighters say the entire house was engulfed in flames.

The plane is believe to have taken off from a small airport in Georgetown, Texas. It is not clear whether the plane was registered to Stack, according to Fox News.

The plane struck the second floor building of the Echelon office building about 10 a.m. and burst into flames.

Reports speculate that Stack, a software engineer, who may have been employed in Austin,had an ongoing feud with the IRS, which has offices located in the building in which the plane crashed.

The plane was single-engine Piper Cherokee.

This is the document that is posted on Stack's EmbeddedArt.com Web site.