Vance Luther Boelter, the man accused of killing a Minnesota lawmaker and her husband and injuring another couple, planned the attacks for months and had dozens of apparent targets, prosecutors said Monday.

St. Cloud State graduate Vance Boelter appeared in federal court Monday afternoon. He is assigned a public defender, citing financial woes.

Vance Luther Boelter, the 57-year-old man suspected of shooting two Minnesota lawmakers and their spouses at their residences in the early hours of Saturday morning, was taken into custody Sunday evening,