Yes you are citizens too but you choose to work for the government if you use force against a citizen you better damn well testify about that even if it incriminates you in a crime and could loose your job otherwise you don't deserve to work for the people and should loose your job. Because constitutionally you do cede some of your rights as a public employee acting in your public duties the constitution limits your powers. Notice I separate your private rights from your public service. Because people have rights, government doesn't. But then to argue that government is made of people so they deserve those rights and even "special protections" is just plain contrary to the protections we as citizens are supposed to have against "police" actions of the government.
I recognize that reality isn't what it should be though.And how the courts have watered down citizens protections while increasing "special protections" for government workers.
You know what is funny (not that you have said this) how so many statists and LEO and pro LEO folks like to use that false argument of "if you got nothing to hide" for individuals who want to invoke their rights of 4th and 5th amendments against government intrusion, yet when the citizens demand the same from them they want to try to hide behind protections they don't have. I can go to your human resource department and ask for your e-mails you have no right to stop me, yet without a warrant you can't get mine.