Garry's Mod Crashes When Shooting a NPC?

Hi, I would like to know if there are any solutions to this problem. Whenever I shoot an NPC (or they get shot and shoot back) 9 times of 10 the game will crash. However, fighting zombies works fine.

I’ve tried the following:

-Change to lower Dxlevel.
-Change to higher Dxlevel.
-Removed folder (C:\Program Files\Steam\steamapps\carter1010\garrysmod*garrysmod*) to delete any non-working/ conflicting addons & files
-uninstalled and reinstalled the game.

The only thing I know of that I haven’t tried is verifying the game cache. I’ll do that now. Until I test that out and see if that worked, what other suggestions do you have for me?

Other than this problem everything else works fine, except for dark, dirty looking water.

Thanks for reading at least if you don’t have a solution.