June 16 (UPI) -- The man accused of shooting two Minnesota lawmakers and their spouses -- two fatally -- is now in federal custody on murder charges that could involve the death penalty.

Vance Boelter, 57, was facing first-degree murder charges, Hennepin County Attorney Mary Moriarty said. Minnesota does not have the death penalty and the maximum sentence would be life in prison without parole if convicted.

Boelter, who was turned over to federal custody Monday, was to appear in U.S and state courts in Minneapolis on Monday afternoon.

U.S. Attorney Joseph Thompson, during a news conference, said six federal charges have been filed -- two each for murder, stalking and firearms offenses. The murder charges could incur the death penalty, if he is convicted and federal prosecutors seek it.

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