Mathis, 31, posted a photo to Instagram in which he appears to be relieving himself on a sign at the Internal Revenue Service building with the caption "Audit this."
The specifics of what he is enraged about are unclear.
How high are we counting? RT @dcfanaticsblog: Evan Mathis will be apologizing later today. Count on that.— Evan Mathis (@EvanMathis69) May 15, 2013