cheater in black scum server (esp or wall hack 100% sure)

I meet him befor move like new player, now he move like a pro. and I fund out that he ran in the bunker, killed me toke my empty backpack and then run outside agine. and I was come back. it dint take a long time. there for I think esp or wallhack. nobady run in a bunker kill one player just to run out agine.
[Jijni Voram hui musaram] ApocalypsOG
Blizy
Weapon
Default ImprovisedGrenadeLauncher
Distance
16m
Kill Streak: of 3 kills - look out they are on a roll