I think the whole incident is wrong, but I don’t think this would fall under that statute. I’m sure you sign some sort of waiver when you get a liquor license that allows this sort of raid. Additionally, now that the raid has taken place, the “witness” or “accuser” is now the Commonwealth of Pennsylvania, not the informant.
I am not a lawyer, or a Constitutional scholar, but is it possible to sign away your rights? I know that the govt does infringe, but doing so and having it stand up under appeal should be totally different. As in a "statute of limitations" to collect a debt. The state of WA has found that you waive that "right" in child support cases. Funny how millions of illegals steal identities, suck off of the system, but there is NO FORIVENESS for child support, parking/speeding tickets.