Kevin Dahlgren, 23, was extradited to the Czech Republic last year after fleeing to the United States following the killings of his cousin, her husband and the couple’s two sons.
“He committed the crime in May 2013 in (the southern city of) Brno-Ivanovice, where he deliberately killed four people in a family house,” prosecutor Hynek Olma said in a statement.
Dahlgren was detained at the Washington airport a day after the killings, and is the first American to be extradited to the European Union member state.
Dahlgren, who faces 15 years to life in prison if convicted, stabbed his relatives to death and then “attempted to burn three of the four bodies by setting fire to them in the basement of the home,” according to US court documents.
The father and one of the sons were musicians in an amateur ukulele orchestra and the woman was a teacher, according to local media, which added that the house had been set on fire after the crime.
Dahlgren’s Facebook page said he was from Palo Alto, California, and that he had offered English lessons in Brno, the Czech Republic’s second-largest city.
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