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.

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 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.

Minnesota Rep. Melissa Hortman and her husband Mark were killed. Sen. John Hoffman and his wife were injured in the shooting.

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

Vance Boelter is charged with the assassination of Minnesota Senator Melissa Hortman and the fatal shooting of her dog, Gilbert.

Vance Boelter, 57, impersonated law enforcement when he carried out the violent rampage early Saturday, authorities said.