Since other Administrations have had the interest, the energy, and resources to prosecute out-of-control cops under the Civil Rights Act of 1964, it should not be unusual for anyone to call for a similar prosecution.
For example, even under a Republican Administration after the police officers who beat Rodney King in 1991 were acquitted in a State-court proceeding,
"In August 1992, a federal grand jury returned a two-count indictment charging that Stacey Koon, Laurence Powell, Timothy Wind and Theodore Briseno, while under colour of law, deprived Rodney King of his federally protected civil rights. The first count of the indictment charged three of the defendants -- Powell, Wind, and Briseno -- with violating King's federal constitutional rights by wilfully using unreasonable force against him while arresting him. The second count of the indictment charged Koon, then a sergeant of the Los Angeles Police Department, with violating King's federal constitutional rights by wilfully permitting the three other officers to unlawfully assault him, thereby wilfully depriving him of his right to be kept free from harm while in official custody. Both counts charged violations of 18 U.S.C. 242, which, if injury results to the victim, is punishable by a maximum term of ten years' imprisonment and a $250,000 fine. As previously noted, section 242 generally makes it a crime for anyone under colour of law to deprive any inhabitant of any state, territory or district of any rights protected by the Constitution or laws of the United States. The jury in this instance was composed of nine white persons, two black persons and one Hispanic person."
http://www.nizkor.org/hweb/orgs/canadian/canada/justice/hate-motivated-violence/hmv-006-00.html
Somehow, however, you do not want the Oakland perpetrator to not be prosecuted under the Civil Rights laws and you cannot articulate a good reason for not prosecuting him for his criminal actions that were videotaped. Instead, you want to dilute the attention given to this cop by directing it elsewhere to people who were not participants and cannot be criminally prosecuted for violating his Civil Rights.