UPDATED: Sheriff's Office sergeant injured, subject deceased following officer-involved shooting in Welches



The names of the involved officers and deputies in the July 3 incident can now be released:

  • Sgt. Sean Collinson, Clackamas County Sheriff’s Office, with 25 years of service.
  • Ofc. William Wetherbee, Sandy Police Department, with 12 years of service.
  • Ofc. Michael Boyes, Sandy Police Department, with 4 months of service. Identified as the officer who fired his weapon.

The subject who died at the scene had been identified as Doug Diamond, 58 years old, of Tualatin, Oregon.

On July 3, 2020, Clackamas County Sheriff’s Office deputies were dispatched to the Mt. Hood Village RV Park (65000 E. Hwy. 26) on a report of a suicidal subject who was armed. The deputies arrived a short time later and located Doug Diamond outside of his RV in the camping area. Deputies, including a crisis negotiator, began a dialog with Mr. Diamond that went on for several minutes. During that time, a Clackamas County Sheriff’s Office sergeant and officers from the Sandy Police Department responded to the scene as well.

As the situation evolved, deputies began to issue verbal commands to Mr. Diamond, who refused to comply. A less-than-lethal shotgun was used, as well as a Taser, but neither were effective in subduing Diamond. As the incident continued, an attempt was made to physically take Diamond into custody. In the struggle, Diamond produced a semi-automatic handgun, pointing it at the Clackamas County sergeant. A Sandy Police officer then fired his duty weapon, striking Diamond. Additionally during the event, the CCSO sergeant was shot, suffering injuries to his arm and finger.

Investigators now believe the Sandy Police officer was the only person to fire a weapon.

Deputies and officers on scene rendered immediate first aid to Mr. Diamond and to the sergeant. Mr. Diamond died at the scene. The sergeant was transported to an area hospital and is in good condition, recovering from his injuries at home.

As per the Clackamas County Deadly Physical Force Plan, the Clackamas County Interagency Major Crimes Team agreement, and Oregon Senate Bill 111, a joint investigation was initiated. This response included detectives and investigators from the Oregon State PoliceMolalla PoliceTualatin PoliceOregon City PoliceLake Oswego PoliceClackamas County Sheriff’s OfficeClackamas County District Attorney’s Office and Clackamas County Medical Examiner’s Office.

This joint investigation is ongoing. The involved officers and deputies are currently on paid administrative leave, as is protocol following a deadly use of force.

The initial Twitter post from the Sheriff’s Office stated that Diamond had shot the sergeant. This was based on information initially available from the scene. Following forensic work and interviews, investigators have since determined that initial information was inaccurate. That initial tweet has been deleted.



Please reference CCSO Case # 20-013809

An officer-involved shooting this afternoon left one Clackamas County Sheriff's Office sergeant wounded and the subject dead following a confrontation at the Mt. Hood Village RV Resort in Welches. The sergeant's injuries are not life-threatening.

At 2:46 p.m. on Friday, July 3, 2020, Sheriff’s Office deputies and Sandy Police officers responded to a welfare check on a possibly suicidal subject at the Mt. Hood Village RV Resort in Welches. Deputies received information from a family member that the subject was in mental-health crisis.

Deputies responded to the Mt. Hood Village RV Resort, located at 65000 E. Hwy. 26 in Welches.

Upon arrival, deputies contacted a 58-year-old white male subject. A Patrol deputy who is also a crisis negotiator was on-scene and attempted to reason with the subject in an attempt to de-escalate the situation.

Investigators are still conducting interviews and reconstructing the ensuing confrontation. At this writing, investigators have determined that law enforcement personnel attempted to deploy less-lethal options to subdue the subject, without success; the subject produced a handgun; and one member of law enforcement shot the subject, killing him.

During the confrontation a Sheriff's Office Patrol sergeant was shot in the arm. The injured sergeant did not fire his weapon. The injured sergeant and officers on-scene immediately began to provide first-aid to the subject. Deputies then realized the sergeant had been shot and had him stop providing aid. They placed a tourniquet on the injured sergeant's arm.

The sergeant was alert and communicating with AMR and Hoodland Fire paramedics at the scene. Life Flight was called, but the deputy was transported to an area hospital by AMR ambulance after the wounds were determined to be non-life-threatening. He was treated and released.

The Sheriff's Office and the multi-agency Clackamas County Major Crimes Team are leading the shooting investigation. Currently, detectives from Tualatin PDOregon State PoliceMollala PDCanby PD, and Lake Oswego PD, as well as CRAFT and CSI technicians are processing the scene and detectives are conducting interviews. Personnel from the Clackamas County District Attorney's Office and Clackamas County Medical Examiner's Office are also on-scene.

Photos from the scene are attached. B-roll video can be downloaded from this Dropbox address:

The deceased suspect's name will not be released at this time pending family notifications.

The injured sergeant's name will not be released at this time pending family notifications.


Sgt. Marcus Mendoza
Clackamas County Sheriff's Office
Public Information Unit