I have seen this character in gmod workshop and used it as Player Model and even seen it in vrchat, i have no clue where it comes from sadly. I recommend if you can, go search it on the steam gmod workshop you are gonna find it if you just search police model or sum. They usually say in the description where the model is from or in the discussions. The last resort would be asking in the comments or just scrolling throught them people there are usually helpfull and fast! Good luck on your search