PORTLAND, Ore. (KOIN) — The man who deputies say killed four people inside a Clackamas County home late Saturday night was arrested in August 2018 for unlawful possession of a weapon.

The Associated Press reported Mark Gago was booked in Clackamas County for that charge, but Sgt. Brian Jensen did not provide any details on the circumstances of the arrest.

Court documents out of Marion County show Gago had been wanted for failure to pay child support. His last payment had been made in January 2015.  

He had a March 25, 2019, hearing scheduled for contempt of court. 

Gago, 42, was fatally shot by deputies Saturday night when they responded to the Woodburn home and said they found Gago trying to kill an 8-year-old girl. 

“…. [deputies] found a male, which they believe [was] attempting to kill a child,” Jensen said. “They then used deadly force to kill the subject, which saved the life of the child.” 

Investigtors said the victims, 9-month-old Olivia Lynn Rose Gago, 31-year-old Shaina E. Sweitzer, 64-year-old Pamela Denise Bremer and 66-year-old Jerry William Bremer, were not killed by gunfire.

“It was not a gun,” Jensen said. “There are numerous weapons around the house that can be used as weapons, so investigators are trying to figure out exactly what it is that he used to kill 4 people.”

The Associated Press contibuted to this report.