Gunfire from a passing car ripped into a crowd of partygoers in the River North neighborhood, the police said.

© Jim Vondruska for The New York Times

A line stretched around the block to honor State Representative Melissa Hortman, her husband and their dog, who were killed in an attack that officials have called a political assassination.

© Tim Gruber for The New York Times

© Tim Gruber for The New York Times

© Tim Gruber for The New York Times

The man is accused of killing State Representative Melissa Hortman and her husband, Mark, as well as wounding another Democratic lawmaker and his wife.

State Senator Ann Rest, a Democrat, credited police officers who were proactively checking on her safety with sparing her from an attack.

© Matt Slocum/Associated Press