"Is that an order?"

STRATEGY

When a cop stops you, here is a suggested strategy (assuming you're doing nothing illegal/unlawful):

First, note the time you were stopped. Also, note the name(s) of the cop(s)
1. When the cop orders you to do something,
2. with a friendly demeanor you say him,
"Thank you. Is that an order?"
If he says "No", then you say,
"Thank you. Am I free to go?"
If he says "No", then start over at "2".

3. If he says "Yes", then you say,
"Thank you. I will comply".
Then, you comply totally with the order, no matter what the order is.
Anything he tells you to do, you go back to Step 2.

When your interaction is complete, note the time.
Set your hourly rate and send the cop(s) and employer a bill for your service.
Use small claims court to enforce the adhesion contract.
STRATEGY BASIS

Article XIII of the Constitution for the United States of America prohibits slavery. When you are working under the total control of the cop, you are a slave. For the cop to avoid being accused of making you a slave, he (or his employer) must pay you for your services.

By accepting the cop's offer (i.e. by complying with his orders), you have entered into an adhesion contract with the cop.

An adhesion contract is a contract that is offered on a "take it or leave it" basis: there is no negotiation of the contract. E.G., a property lease or an insurance contract; the terms are dictated by the offeror. A simple contract is one in which the parties negotiate till they agree on the terms. For an adhesion contract the burden is on the offeror to cover EVERYTHING. Any point not covered must be decided in favor of the other party. That's why insurance and leases have so much fine print.

When the cop orders you to do anything, he is creating an non-negotiable adhesion contract. Because he failed to state what he would pay you, you later determine the value of your service, and send a bill to him and his employer. The bill should be no less than the federal minimum wage per hour. On the other hand, attorneys charge as much as $600/hour ($10/minute) for their time. You choose the value of your time.

If they refuse to pay, take them to small claims court!