Here you can find the oral arguments in Herring v. United States.
The case runs thusly:
The Court has already ruled that clerical errors on the part of the court system do not constitute a need to apply the exclusionary rule. What is at question here is whether that same standard should apply to the police. Indeed, in the oral argument, part of the question is just who counts as the police.
On behalf of Herring, Karlan argued that the exclusionary rule should be in place in this case, if for no other reason than to ensure better record-keeping. The government argued that there were already other measures in place to encourage good record keeping, and that the exclusionary rule would constitute a cost without any real benefit.
The Justices asked some tough questions, and for a moment I thought they were going to bring up my own concern. At issue were things like: is it a matter of negligence? Who, exactly, counts as “the police” if we adopt this rule? But to my mind the most pressing issue is: if the cops know that an “honest” mistake can lead to evidence admissable under the Fourth Amendment, is that an encouragement to make “honest” mistakes?
Justice Souter brings up some of my other concerns here. I don’t believe, as such, that cops are just assholes looking to get people in trouble, but it is their job to collect evidence for the purposes of prosecution. It would make their job easier if less pretense were needed to collect evidence.
I don’t think the government makes a very strong argument in this case, but it does raise some questions worth considering. For instance, if the police were being very careful about this, hypothetically, they devote great resources to making sure all their warrants are valid, and let’s say that they end up with something like a 3% error rate: are we justified in still applying the exclusionary rule? It would seem not, as they’re doing the best that they can. But then the question becomes, do we have to then hold a hearing for every case to determine whether the police were being negligent? Every case would become a circus. (How much should podunk, AK spend on ensuring valid warrants?)
If I were deciding this case, I think I would have to side with the petitioner, but only for the reasons that Souter mentions. The petitioner mentions: “…[****U]nless the exclusionary rule applies, law enforcement departments have no incentive to expunge recalled or otherwise invalid warrants from computer databases; there is no reason to believe that law enforcement agents will be disciplined for negligent record-keeping; and it will be virtually impossible for illegal arrest victims to obtain redress.” [From the scotuswiki summary; not a direct quote] I agree with the government that, as such, there are other reasons why the police might not be negligent in record-keeping, but do we want to turn warrants into the next traffic stops? Because I think that is a real possibility. Someone doesn’t pay their city taxes (or some other civil issue) and a warrant is issued; cops don’t spend a ton of resources chasing down these warrants when there are more important things to do; and then someone deals with the issue and the warrant is removed. Now, what incentive, really, do the police have? If they are negligent, perhaps only by budget restrictions or something (not even a direct conspiracy), then this really does broaden their powers in inappropriate ways, IMO.