#77 Guard at Holy Land can be grenaded without alerting guards

[Sofox]

I don't know how widespread this problem is but:
When you approach the Holy Land, a guard blocks your way. If you try to kill or get past him, more guards are alerted.
However, if you throw a grenade at him from a distance, he'll be killed and no further guards will be alerted.
You can then sneak into the Holy Land by pulling the lever and walking onwards.

[Joseph P Morris]

This is going to take a bit more logic than just making the explosion system set the suspect.
Firstly, make the explosion summon a guard to the location of the blast (using hidden marker as target)
Secondly, make sure that when a guard dies he screams for help