Vance Boelter, 57, has been charged in the shootings of two Minnesota lawmakers and their spouses. The Hennepin County Attorney said Monday that her office intends to pursue first-degree murder charges against him as well.

One of the other lawmakers was on vacation and the suspect left the other house after police arrived early Saturday, acting U.S. Attorney Joseph Thompson said at a press conference.

The suspect is accused of fatally shooting Minnesota state Rep. Melissa Hortman and her husband, Mark, at their home. He also shot Minnesota state Sen. John Hoffman and his wife, Yvette, at their home — but they survived the attack.