A bunch of cops came into my house looking for a gun that was lied about, didn't find a gun obviously because it didn't exist?

I dont understand why people ask questions like this and leave out the most important detail: what evidence is being used against the accused. Your Question says nothing about the evidence linking the pot to the people Ben g accused. None of that stuff in your question is evidence. It's the evidence that determines what kind of case can be made and how.

Oh and by the way the fact that a gun isn't where cops searched for it doesn't prove that the gun was never there.

Sounds like you live in America. No telling there. The cops only need think and the damage they do is on.

Was there a warrant for the police to even come in? Not enough info.

One day they came to my home too (not need again to tell you why...); I had an argument with them; I was about to hit them! F*uck da police !

If they think they can prove their case, they will prosecute. The acused will have to mount a defense.