Sophie and Colin Hortman are responding to the fatal shooting of their parents, Minnesota state Rep. Melissa Hortman and Mark Hortman. In a written statement released Monday night, Sophie and Colin Hortman said they're "devastated and heartbroken.

Sophie and Colin Hortman released the following statement on behalf of the Hortman family: “We are devastated and heartbroken at the loss of our parents, Melissa and Mark. They were the bright lights at the center of our lives, and we can’t believe they are gone. Their love for us was boundless. We miss them so much.”

A manhunt is underway for the gunman who was impersonating a police officer and had a list of possible targets, officials said.

A suspect is in custody after Minnesota State Rep. Melissa Hortman and her husband were fatally shot Saturday, while State Sen. John Hoffman and his wife were wounded.

Minnesota State Rep. Melissa Hortman was more than just the state House’s top Democrat, according to those who knew her. She “was a bright shining light of a human being,” Minnesota Secretary of State Steve Simon,

He wounded Sen. John Hoffman and his wife but didn’t come into contact with the two other DFL legislators, investigators say.

The children of Melissa Hortman and her husband Mark Hortman are speaking out on their parents' murders. “They were the bright lights at the center of our lives, and we can’t believe they are gone," Sophie and Colin Hortman wrote in a statement obtained by PEOPLE Monday.

Vance Boelter, the man accused of shooting two Minnesota state legislators and their spouses, visited the homes of four lawmakers over the course of a few hours early Saturday. Federal prosecutors have charged Boelter,