Czech authorities suspect that Kevin Dahlgren fatally stabbed his aunt, uncle and two cousins in the city of Brno during his May 2013 stay. Authorities said the victims had been stabbed in the head and neck, and it appears that he tried to burn three of the bodies.
Dahlgren was detained briefly on May 23 at Washington Dulles International Airport as he returned to the U.S. after the visit.
