This is the one thing Larken Rose is right about. (It's also the one thing he agrees with Henry David Thoreau, Lysander Spooner, and Frederick Douglass on, but he did make a good video about the principles, here:
)It's also Robert Higgs' position, as explained here:
(Of course, Higgs is actually technically wrong, because his first proposition is technically incorrect, though is is correct in current practice. Police take an oath to uphold the constitution, not to enforce every law. However, the police's paymasters, the police chiefs and most sheriffs, incorrectly insist that an oath to uphold the constitution implies an oath to uphold every existing law. This is the crime that is being committed, because it makes every cop bad, with a threat of being fired if he acts justly, and enforces the good laws against the bad cop majority. Technically, cops should obey their oaths to the constitution, and thereby not enforce most laws. However, this is not even true of the "oathkeepers" who almost all enforce laws that lack a valid corpus.)
...And pretty close to Radley Balko's position, as explained here (numerous articles):
https://www.google.com/#q=radley+balko+thin+blue+line
So yeah, there are no good cops, because all good cops get fired, since the institution itself is corrupted, and all police chiefs are "bad cops." Some genuinely good cops who got fired for being good were Justin Hanners:
and Bradley Jardis:
This county-by-county map further proves this point, showing that all police departments exist primarily to steal money, and secondarily to legitimize that theft by "enforcing some of the laws people agree with.":
http://www.nytimes.com/2016/09/02/upshot/new-geography-of-prisons.html?hp&action=click&pgtype=Homepage&clickSource=story-heading&module=first-column-region®ion=top-news&WT.nav=top-news&_r=2
So, now you have a fuller picture of what it would take for cops to be "good."
Sadly, only Dale Brown of "Threat Management" is currently hiring and paying "good [proper function of a cop]s."
There was also a similar project in Houston, run by Gil Guillory.
https://sites.google.com/site/gilguillory/
Lawful (common law) threat management is essential. "The Police" as currently defined, are not.