...do police get before being put on the streets?
There are over 500,000 laws at the federal level. Every year, lawmakers put their names on new ones.
How often are you required to update what you know? Are you also informed of older, still on the books but not enforced laws?
How do the various police departments keep Law Enforcement up on the Law?
Kind of a complex question, Bob...
We get some number of hours of dedicated "legal" training as part of the academy; it's something like 60 or 100 hours of just "legal" material. But there's more legal material covered in different areas, too. For example, the traffic code is a separate area of instruction.
HERE is a link to the 96 page document covering the state MINIMUM standards for legal matters.
On top of that, we're required to obtain 4 hours of recognized legal training every 2 years, as part of our 40 hour in-service requirement in Virginia. (Different states have different standards.) That often doesn't include "routine" things like memos and notices about changing laws or new rulings that effect our job.
I'm not atypical; I actually read many US and Virginia Supreme Court or Court of Appeals rulings on matters that are relevant. It can often be important to understand how the courts reached their conclusion so that I can hopefully reach a similar conclusion on the street... For example, when does a consensual encounter become a detention? What language is an actual invocation of the right to counsel -- and what conduct might be a waiver?
We also get constant reinforcing legal training every time we go to court. Whether it's from a prosecutor, a judge, or even a defense attorney, they're constantly teaching us, whether they mean to or not. I'll pay attention to what worked well or didn't work well in articulating why I stopped a car, or what supported my search or arrest -- and apply it later.
Finally, I read the code book. Used to do so very regularly, like on slow night shifts. It's amazing some of the things that are in there... I'm dying to charge someone with "Vagrancy, to wit, living a profligate lifestyle!"