Authorities said Gago had killed four others before deputies arrived, including Gago's parents, Jerry Bremer, 66, and Pamela Bremer, 64; his girlfriend, Shaina Sweitzer, 31; and his 9-month-old daughter with Sweitzer, Olivia Gago. Officials have not said how Gago killed the victims.
"We're not sure what was used at this time," sheriff's Sgt. Brian Jensen said Sunday, the AP reported. "I've been told that there were numerous weapons, swords, things of that nature in the residence."
A roommate also was hospitalized with non-life-threatening injuries, deputies said.
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– The Associated Press contributed to this report.