The 2010 Austin suicide attack occurred on February 18, 2010, when Andrew Joseph Stack III deliberately crashed his single-engine Piper Dakota light aircraft into Building I of the Echelon office complex in Austin, Texas, United States, killing himself and Internal Revenue Service manager Vernon Hunter. Thirteen others were injured, two seriously. The four-story office building housed an IRS field office occupying the top three floors, along with a couple of private businesses on the first floor. Prior to the crash, Stack had posted a suicide note referring to "greed", "insanity", and the IRS, dated February 18, 2010, to his business website.