When a LEO requests a warrant from a judge and the warrant turns out to be wrong, that LEO ought to go on a list of officers who cannot have any further warrants signed for three years or more.
Get it right or lose the privilege.
How about “the LEO ought be prosecuted with violation of the same laws any American citizen under the same circumstances would be charged with, and removed from the force”.
Bingo. Instant motivation to make certain they have the right information, on the right person, at the right place and time.