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.

Early Saturday morning, Minnesota House Speaker Emerita Melissa Hortman and her husband, Mark, were assassinated in their home.

"The best way to honor our parents' memory is to do something, whether big or small, to make our community just a little better for someone else.”

Senators Amy Klobuchar and Tina Smith honored the late former Democratic House Speaker Melissa Hortman and her husband, Mark, on the Senate Floor on Tuesday, June 17.

Two days before her assassination, Hortman made a plea for more bipartisanship and face-to-face conversations, rather than social media echo chambers.

Gov. Tim Walz called the event a “politically motivated assassination," with the attack marking the latest such incident over the last several years.