Investigators discovered methamphetamine at the residence of Karl Thomas Holmberg, the 64-year-old man accused of shooting multiple officers at his home in Princeton two weeks ago. A search warrant made public on Monday revealed that crystal-like substances, which field-tested positive for methamphetamine, were found at the house shared by Karl Thomas Holmberg and his wife, Dorine Holmberg. Authorities suspected the couple of selling methamphetamine, as indicated by a separate search warrant made public last week.
The Sherburne County Sheriff’s Office drug task force executed the search warrant on the morning of October 12, following a months-long investigation during which investigators purchased methamphetamine from one of the Holmbergs at their residence on multiple occasions. Upon entering the home, Karl Thomas Holmberg allegedly opened fire at the officers, injuring five. Two officers returned fire during the initial exchange, and one later used a less-lethal round to assist in apprehending Holmberg. At that time, officers observed black smoke inside the house and discovered a charred headboard.
After Holmberg’s arrest, investigators found a container and substance on the headboard that field-tested positive for methamphetamine. Additionally, authorities discovered two digital scales, a handgun, and a short-barreled shotgun within the residence. Holmberg has been charged with six felony counts of first-degree attempted murder and six counts of first-degree assault. He is currently in custody at Benton County jail with a $6 million unconditional bail. His next court appearance is scheduled for December 20.
Karl Thomas Holmberg’s attorney, public defender Robert O’Malley, did not respond to a request for comment. Dorine Holmberg, Karl’s wife, has not been charged in connection with the October 12 shooting or any recent drug-related crimes, despite having previous convictions for three misdemeanors related to violent or drug-related offenses.