Federal investigators allege Boelter stalked his targets and planned his attacks carefully, researching the victims and their families as well as conducting surveillance on them "for an extensive period of time."
"This was a political assassination," Thompson said Monday.
At his hearing Monday afternoon, Boelter said could not afford an attorney, adding he had about $20,000 to $30,000 in savings, though he also said he owned his home and had seven cars to his name. The judge said, for now, Boelter would be appointed a federal defender.