On Monday, April 17, 2023, investigators, with the use of law enforcement resources, located Rene Castro (36) at a residence in Ontario, Malheur County, Oregon. He is believed to be the shooter that killed an on-duty reserve officer.

The Oregon State Police SWAT team, along with members of the FBI, Ontario Police Department, Malheur County Sheriff’s Office, and other agencies, surrounded a residence in Ontario at approximately 6:40 A.M. and began calling occupants from the home.
At approximately 7:40 A.M., Rene Castro exited a structure and was taken into custody by OSP SWAT personnel.
Neither Castro nor SWAT personnel were injured during his arrest.
While the arrest has been made, authorities say the investigators are still processing evidence and continuing their work.

A criminal complaint is only an accusation of a crime, and a suspect is presumed innocent until proven guilty.
Source: Malheur County