Koolau, I think you watch too much television, Hollywood does not reflect reality. There are about 18,000 law enforcement organizations in the United States. Most officers, and Federal Agents are not lurking around trying to convict an innocent person. Most people in the U.S. trust them, and for good reason - they have earned it. Your example of an officer trying to threaten a Dr in order to get medical records just would never happen, as the officer would be committing a crime not to mention that there are legal ways to get the records. If it has happened, post a link to the story please.
Nodak's story of the Eagle feather is also a joke, post a link.
Bottom line is defense attorneys have a more difficult job getting a guilty person off if the guilty person honestly admits his guilt to the cops. Has nothing to do with keeping an innocent person out of jail. I knew a prominent former defense attorney fairly well and once asked him how many of his clients were actually innocent. His reply..."one, I think".
It is true the system is designed to let off several guilty people before convicting an innocent person. It works that way for a reason, and I think generally works well, with some exceptions (OJ?). If you are the family of the victim when the guilty walk it seems crazy. There is no need for additional people to try to get more obviously guilty people off.
I doubt the cop from Virginia Beach (size 840 officers) has ever worked with police in another country, has made 'thousands of felony arrests' or speaks for the other 17,000+ law enforcement agencies. Rarely would a good cop grow up and want to be a defense attorney.
Honest people (most of you) should just keep being honest. Don't commit a felony. If you do, by all means get a lawyer (a good but honest one) and hope you are one of the criminals that get off.