Just one example of cops in this universe being COMPLETELY incompetent, but in S12E10...

...Sam, Dean, and Castiel are investigating a murdered angel in an arcade bar that the police ruled a stabbing. Not only were the police not still there, but 15ft away there was a FREAKING ANGEL BLADE under the pool table, which would have perfectly matched the goddamn entry and exit wound on the victim!!

Wtf are cops doing in this universe?? No CSI, no tape or evidence tents, and certainly not enough due diligence to bag the fucking murder weapon that was apparently in full view 🤦‍♂️😂