> A police officer's job is to lie to you

Federal statute should categorize that as a fireable offense and an intentional tort incurring punitive damages at minimum, and any subsequent proceedings (after the lie) as inadmissible evidence.

If that makes investigation more difficult, then so be it. For too long, law enforcement and federal investigators have relied on inappropriate and immoral techniques to obtain conviction. Mass surveillance, warrantless wiretapping, manipulating suspects -- what happened to old-school investigation that was after truth via smart observation and deduction? There's a reason people love watching Poirot: it's a (admittedly stylized) snapshot of real justice in progress.

Their expected standard of behavior should be higher than that of citizens.