The other source, Sam, also knew the value of creative mendacity:
"One of my favorite tactics was one my partner used. 'I'm just trying to clear out this report,' he told the suspect. 'I promise you're not going to jail tonight; I just need to know what happened.' So when she confessed to the crime, he filed a warrant and she was picked up a few days later."
Technically, he told the truth; she did not go to jail that night.
Now, the right to lie doesn't extend to acting on that lie. A cop can say he's within his rights to search something, but he can't actually go for it without probable cause. Many cops try to get around this via the simple loophole of waiting for you to agree. Bill explained: "If he says he has a right to search something, but then asks permission, then he's making it up. That's a crucial distinction -- some officers are just polite, will ask, then walk right by you. If he actually has the right or obligation to search, then he will and you'll be unable to stop him."
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"Someone's been skipping leg day."