Nothing in the Bill of Rights has been interpreted so far as to prevent holding someone hours upon hours in an interrogation booth while teams of interrogators drill him or her over and over and over- and even outright lie about the evidence against them while doing so.

This LEO bill of rights prohibits that.

The government doesn't have to inform you that you are under investigation. This LEO bill of rights requires that.

Federal prosecutors have such high conviction rates because they threaten, bribe, and otherwise induce plea bargains from people. This LEO bill of rights prohibits that.

The point here isn't that these rights, insofar as they differ from the protections we already have, would prevent corrupt or abusive law enforcement agents from being corrupt or abusive. The point is that law enforcement believes these rights are necessary to protect them from wrongful conviction or punishment.

If they are necessary, shouldn't we all enjoy the same protections?

“Nobody has a legitimate reason to fear a faithful interpretation of the Constitution, and nobody has any legitimate reason to fear effective and complete protection of civil rights." - Alan Gura