Watch as police run from you in fear and panic, and speed past you in their vehicles within utter fear whilst you commit crimes.
This modification tinkers the combatbehavior.meta file to make cop, army, and security peds run away from you only when you are in invincibility mode. Therefore, acquire any invincibility script you please that has the ability to toggle on and off, and use it to toggle the effect of the modded meta file.

I recommend using ZyDevs "(The) Original Godmode Script 2.4.2" which you can find here https://www.gta5-hub.com/scripts/godmode-script. Absolutely all credit goes to ZyDevs for his invincibilty script and I WILL NOT provide it in my .zip. A great thank you to him.

WARNING: Please create a backup combatbehavior.meta before installing.
Instructions:
1. Launch OpenIV for Gta V Windows
2. Browse to : \Grand Theft Auto V\update\update.rpf\common\data\ai
3. Put in my modded combatbehavior.meta into the folder.
4. Play. (Toggle police/swat/army/security flee you by enabling invincibility)

The mod works a little like this. You acquire stars, police come to you, as they start to shoot at you, toggle invincibility, and they start running like hell, even providing dialogue of fear. With my tests, once enabled invincibility, the cops you have already spooked will remain spooked, to recreate effect, lose and regain stars once more.

Features:
Police/Swat/Army/Security have poor combat abilities.
Police/Swat/Army/Security can not take any cover with any object.
Police/Swat/Army/Security do not have peeking variations.
Police/Swat/Army/Security will run/drive/swim/crawl/fly like hell when you toggle invincibility.