The inquiry is standard procedure on all deadly police shootings.
Police say on Nov. 11, 65-year-old Brian Astarita was pulled over for speeding, and when he got out of his vehicle, he aimed a gun at officers.
They repeatedly asked him to put down the weapon before shooting him.
Astarita later died at a hospital.
According to law enforcement sources, the gun recovered appears to be a BB or pellet gun.