Authorities charge multiple California police officers with corruption, civil rights violations

Federal investigation focused on police departments in Antioch and Pittsburg.
Officers charged with conspiracy, fraud, civil rights violations, excessive force, and distribution of steroids.
Investigation began with allegations of cheating on tests but expanded to other alleged crimes.
Indictments reference racist messages, falsified records, obstruction of justice.
Arrest warrants served in California, Texas, and Hawaii.