The Seattle Police Department said in a statement on Thursday that the officer’s actions – who have not been identified – are being independently investigated by the King County Sheriff’s Office at the department’s request.
Earlier on Thursday, the city police watch group said it was requesting a criminal investigation.
The scene was immediately surrounded by officers nearby.
After that, the case was referred to the Oil Pollution Law.
“After further analysis of the video and monitoring interviews conducted by FIT, OPA has requested a criminal investigation,” the statement said.
The email that CNN sent to the Seattle Police Officers Association was not immediately returned for comment.