Maximum depth discussions

Assuming that one has an an adequate gas supply, of the best possible gas (neox/heliox e.t.c) mixture, and assuming that they have a bit of a suicide wish, what would be the maximum possible depth one could descend to before kicking the bucket?
Decompressing afterwards isn't an issue, lets say our diver has just been through a lengthy divorce proceeding and all he has left is the tanks on his back, and a torch with a big battery. He is also physically fit enough to keep breathing to depth, and lets say he is able to overcome any narcotic effects of his breathing mixture enough to keep descending properly. He also has any other specific training and equipment.
Is there a depth where he would completly crush, or where he was no longer able to function due to the pressure?
Decompressing afterwards isn't an issue, lets say our diver has just been through a lengthy divorce proceeding and all he has left is the tanks on his back, and a torch with a big battery. He is also physically fit enough to keep breathing to depth, and lets say he is able to overcome any narcotic effects of his breathing mixture enough to keep descending properly. He also has any other specific training and equipment.
Is there a depth where he would completly crush, or where he was no longer able to function due to the pressure?















