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

Sophie and Colin Hortman are responding to the fatal shooting of their parents, Minnesota state Rep. Melissa Hortman and Mark Hortman.

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.

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.

From the wooden dais in the Minnesota House, then-Speaker Melissa Hortman presided two years ago over what many called the most consequential legislative session in recent history. She helped orchestrate the passage of long-held Democratic goals: increased education spending,

Democratic House Speaker Melissa Hortman and her husband, Mark, lost their life in a fatal shooting in their home in the northern Minneapolis suburbs.