Some joke. This for sure is assault with a deadly weapon. Possibly attempted murder. You don't mention the race of the cyclist but it might also be a hate crime (even though I believe there is no such thing).
The victim should be strongly encouraged to report the officer. If he is worried about the locals then he can go to the state DA or state police.
If you can't depend on the police then who can you depend on?
If caught, these men should never see the light of day. Violent offenders add nothing to our society, they detract from it. They should go to jail for the rest of their lives. Stack them in like cord wood for all I care. As an American citizen, I should be able to ride my bicycle down any street in the country. The sad fact is that I can't.