I was just minding my own business and doing some electrician work out in the world and then i got this Anti-Cheat code 20. I dont know what it means or what triggered it. I was able to log back in the game and i dont have any warnings on my account. I would like to know what caused this. Is it...

No demands were made nothing was said first second he saw me he opened fire. 1.10 Gang members on their HQ can kill everybody in case if you do not agree with their demands.

Requested a taxi. When arrived just started shooting killing me. I requested medic and he got me up and shot me again. Left the scene after he killed another guy. Came 3 minutes later back just to shoot my corpse