The informant provides the opportunity for this sort of thing, not any evidence of crime. The police do not care at all if what the informer says might have any basis in truth or even “honest mistake.” To the Law it is an opportunity to do the things they enjoy and have been trained to do.
I think that the police sense the chance of a lot of forfeiture money. Bank account, real property, equipment, vehicles. The sale of which all the procedures would go to their Christmas Party fund.