Police say Martin Duckworth shot and wounded a Metro bus driver on August 12 in downtown Seattle. He then tried to carjack a delivery truck and a car before getting on a second Metro bus.
When police surrounded the bus, they say Duckworth raised his gun and forced officers to open fire. Officers fired several shots, hitting and killing Duckworth.
The officers had to make a "life-and-death" decision about whether to shoot the suspect on the second bus, Seattle Assistant Police Chief Paul McDonagh said in August.
After reviewing all the investigation materials, King County Prosecutor Dan Satterberg recommended the inquest, which will be handled by a six-member jury.
"Inquests are convened to determine the causes and circumstances of any death that involves a member of any law enforcement agency within King County, in the performance of his or her duties," Constantine said in a Friday news release.
Constantine said inquests provide transparency into law enforcement actions and "ordering of an inquest should carry no other implication."