Sources close to the department, who asked not to be identified for fear of retaliation, said they believe the account may have been run by an Oakland police officer, although no one has been identified so far.
Other posts displayed contempt for department rules and dislike of command staff and internal watchdogs.
The Instagram account was removed last week and is no longer visible to the public.
They also added an emoji of a rat, a derogatory term some police officers use to refer to colleagues who report police misconduct.
I thought it would be really interesting so I took it.
Sorry for long text and grammar mistakes.