Authorities in Milwaukee, Wisconsin, have arrested a 31-year-old man who they claim committed cold-blooded murder before then returning to his home, filing his annual tax return, and heading to a federal building to surrender himself. An arrest report provided to Us Weekly confirms that Dominic Francis Nosacek is facing first-degree homicide charges following the fatal shooting, which unfolded the morning of Monday, February 2. Nosacek, court records confirm, has been diagnosed as having depression and psychosis.