Three police officers who fatally shot a rock-throwing Hispanic man in Pasco, Wash., did not violate department policies or procedures in the February encounter, according to the findings of an internal investigation released Wednesday.

The Pasco Police chief, Robert Metzger, said two of the officers, Adam Wright and Adrian Alaniz, will return to work immediately. The third officer, Ryan Flanagan, has since left the department, Chief Metzger said.

“We have exhaustively reviewed this incident,” he said. “And my decision to return the officers to duty was founded on the determination that their actions were consistent with department policies and procedures.”

The decision came three weeks after the Franklin County prosecutor’s office announced that it would not press criminal charges against the officers in the killing of Antonio Zambrano-Montes, 35. The county attorney, Shawn Sant, said that the actions of the officers would not meet the state’s standard for a crime.