OAKLAND, Calif. — The Oakland Police Department on Wednesday evening announced it is investigating a “series of racist, bigoted and derogatory statements” a probationary officer reportedly made in social media posts nearly a dozen years ago. The officer is no longer employed by the city, the police department said in a statement. The officer was not named in the statement. The police department said it immediately launched an internal affairs investigation on Feb. 2 after a media outlet brought the alleged statements to its attention. “We’re going to do every single thing we can to get to the …