Initiative 940 and subsequent legislation amended the circumstances for when the use of deadly force by a Washington peace officer is justified.  Deadly force is the intentional application of force through the use of a firearm or other means reasonably likely to cause death or serious injury.

Generally, a peace officer may use deadly force when necessary to arrest or apprehend a person the officer believes to have committed a felony, prevent escape, or lawfully suppress a riot if the person is armed with a deadly weapon.  The peace officer must have a good faith belief the use of deadly force was necessary to prevent death or serious physical harm to the officer or another individual.  Good faith is an objective standard, considering all the facts, circumstances, and information known to the officer at the time.

In any case where the use of deadly force results in death, substantial bodily harm, or great bodily harm to an individual, an independent investigation must be completed to determine whether the officer was acting within applicable laws and policies and whether the use of force met the good faith standard.  The Criminal Justice Training Commission (CJTC)  was tasked with establishing criteria to determine what qualifies as an independent investigation.  The CJTC finalized those rules in December of 2019.

An independent investigation team (IIT) is required to investigate any deadly force incident by a peace officer.  The IIT must be comprised of members who operate completely independently of the law enforcement agency under investigation and must include:

• a peace officer certified as an IIT qualified lead investigator; and
• at least two non-law enforcement community representatives who have credibility with and ties to communities impacted by police use of deadly force.

An agency under investigation may not participate in the IIT's investigation except to:

• share specialized equipment when no reasonable alternative exists, the equipment is critical to the investigation, and the use is approved by the IIT commander;
• receive briefings given to the chief or sheriff of the involved agency about the progress of the investigation; and 
• release body cam video or other investigation information of urgent public interest, with the agreement of the jurisdiction's prosecutor.

The Washington State Auditor is authorized to conduct a compliance audit at the conclusion of any deadly force investigation to determine whether the investigative process conducted by the involved law enforcement agency, investigative body, and prosecutor's office complied with the law and rules adopted by the CJTC.  A deadly force investigation is concluded when the involved prosecutor's office makes a charging decision and any resulting criminal case reaches disposition.  The audit must be conducted in cooperation with the CJTC.

Upon request of the CJTC, the state auditor is authorized to audit any law enforcement agency to ensure the agency is in compliance with all laws, policies, and procedures governing the training and certification of peace officers employed by the agency.  A copy of the audit must be sent to the CJTC, law enforcement agency, city or county council, county prosecutor, and relevant committees of the Legislature.

A law enforcement agency shall not pay any costs or fees associated with the above audits.