Ways to Stop Tunnelling

[Jak]

People in my prison are always making tunnels, I tried making dogs to sniff out the tunnels, nothing work! Any ideas?

[It's Free Real Estate]

If you have space outside the prison cell block, add a sniper and activate leathal force especially for high security prisoners because a fearless prisoner escaped my prison so i put leathal force to make sure it does not escape. But in a negative side, if the shot prisoner does not get medic soon well he dies.

Or do this, this may not garantee a prison from escaping. Make a patrol at an area where prisoners might escape and put guards with tazers to paralize them.

Or make an outermost wall in which it is one block away from the edge the map. I dont know if this work but it work foe me when i was in escape mode i tested if i can did a tunnel outside the map and it worked, i did not escape.