Gilbert, the golden retriever trained by murdered Minnesota lawmaker Melissa Hortman, had to be put down after the shooting that killed her and husband Mark at their home.

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

The family of Melissa and Mark Hortman, who were killed by a gunman in their home over the weekend, has gathered at the Hennepin County Medical Examiner’s Office in Minnetonka to oversee the formal procession for the Hortmans.

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

State Senator John Hoffman and his wife, Yvette, were gunned down at their home early on Saturday morning, but survived. Melissa Hortman - the top Democratic legislator in the state House - and her husband, Mark, were shot and killed. Yvette Hoffman said in a statement that she and her husband John were "devastated" by the Hortmans' deaths.

Democratic Sen. John Hoffman, his wife, and House Democratic leader Melissa Hortman were injured in what the governor describes as targeted shootings.