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, and his capture came after he made a big misstep that exposed his whereabouts to an eagle-eyed neighbor,

The search for Vance Boelter put the state on edge. He has been charged with second-degree murder in the attacks, which killed a state lawmaker and wounded another.