On Nov. 18, 2015, police found Gianna and Samantha at the White Horse Ranch in Herman, Minnesota, where they had been living with owners Gina and Doug Dahlen for the past two and a half years.

Suspect in Minnesota Attacks Was a Doomsday Prepper, Investigator Says An F.B.I. agent said Vance Boelter left instructions for his wife in the event of a calamity, according to a court document.

The statement also said that they were “aghast and horrified” that an alumnus of an Institute was a suspect in the Minnesota shootings. “This is not who we are. This is not what we teach.” ...