I suspect that either this was some confidential informant who just reported false claims about Afroman and the police used it to get a warrant. Or the whole department is just corrupt and make up stuff to get a warrant in order to raid his house hoping to forfeiture his money.

So yes, there was an informant who was cited as the reason for the warrant, but the credibility is questionable. The informant referenced a basement that county records would show should not have existed - presumably the SWAT-like team doing the raid didn't bother to consult building plans for any planning, because that would have cast all the testimony into doubt.

This part I've heard from social media sources and haven't seen in reputable documents, but some of Afroman's claims about the police officers and their history of sexual abuse is apparently based on claims from the same informant that were never investigated.

The whole thing stinks and I'm glad attention has been thrown on that department.

They also claimed that they're received hundreds of calls one day, with violent threats from some anonymous individual, and when they tried to track the number, it didn't work, "the numbers didn't actually exists" or something like that, and there is no way of proving the calls actually happened, except for the call log at their police station.