It's generally understood that police will lie like rugs at every point in the process, because the smooth functioning of the system requires it. But, when the

It's generally understood that police will lie like rugs at every point in the process, because the smooth functioning of the system requires it. But, when they're directly lying to a judge, the judge tends to take it personally (since no one likes being lied to) and has the power to impose immediate consequences. Make no mistake, they do lie to judges, or at minimum give incantations with no regard to their truth value ("I noticed a furtive movement"). But easily-disproven lies are riskier.