Hard to frag yourself when you're out of ammo, grenades, or other munitions.
Or if your grenades have been sitting out in a tropical environment for 50 years - good luck with that old detonator...
They must have finally gotten ronry, so ronry.
It might be a true story. Maybe... 60 years is a long time to E&E in a jungle.
There were expected to be very resourceful.
I'm sure that they could have found a knife, broken bottle or a rusted can to disembowel themselves.
Oh, the shame of being captured would have been too much.