Metro Police AI

Hello! I have a question. You know at the start of Half Life 2 where the metro police simply push you away if you go up to them and if you keep doing they zap you with their stunstick? Does anyone know a addon or mod that does that in Gmod? Even better would be a mod or addon that causes metro police to push you away when you go up to them BUT they will attack as normal if you shoot or hurt someone nearby. Thank you for taking the time to read my question.

You can do that in a map,but I don’t know if you can do that in game .