With limited evidence and few witnesses, it's often difficult to make arrests in arson cases. Other times, however, there's a guy with a burnt-up face, as there was after a house fire in Cottage Grove, Wisconsin this week.

On Sunday night, the planned home of sex offender Harold Nyberg was set on fire for the second time in three months, The Journal Times reports. Nyberg, currently on supervised release, has faced "vocal opposition" to the move from his potential neighbors, including 50-year-old Russell A. Speigle.

Not so coincidentally, police say they found Speigle with fresh burns on his face while canvassing the area. After a brief hospital stay, Speigle was booked on charges of arson.

Sheriff Dave Mahoney condemned the fire as an "unacceptable" act of vigilantism on Tuesday, saying, "Not only did the actions of Mr. Speigle endanger public safety professionals, it endangered his own neighbors."

[Image via Dane County Sheriff's Office//h/t Death and Taxes]