Accused Minnesota assassin Vance Boelter's alleged plan to kill more politicians on his target list was foiled by a police sergeant's proactive hunch.

Vance Boelter, 57, was arrested late Sunday night after what law enforcement officials said was the largest manhunt in Minnesota's history.

In a politically motivated attack, two Minnesota lawmakers were shot in their homes early Saturday. Former House Speaker Melissa Hortman was killed, while State Senator John Hoffman was wounded. Authorities are conducting a statewide manhunt for the suspect,

As investigators probe the extent of alleged political assassin Vance Boelter's plot targeting Minnesota lawmakers, some questions remain unanswered.