User blog comment:Llama919/Possible Beast Titan Identity?/@comment-5774380-20150618200119/@comment-26303790-20150620010109

I for one am open to both theories. they both have ways to prove and disprove each other. But lets just assume for a moment that it is erwins father. Now lets go back a bit. remember how there was that story about a man who tried to dig under the walls? And his friend found out. Them pne day him and the hole disapeard? I know they said that it was unsucceful because there was no end to how deep the wall went. But MAYBE (this is far fetched i know im sorry) just maybe when erwins father escaped he managed to find the hole (then cover it up? i honestly have no explanation for that one) and maybe break a hole into the wall or maybe a door with a passage to the outside? any way that part dosent matter. what does is that being out in the open world so long MUST have done something to his mental state. and if he wasnt already a titan him becoming one would DEFINITLY add to it. So he goes insane, become psychopathic, and forgets a lot of the world inside the walls.

This is the first time ive made a theory and a lot of it was on the spot so if it sounds bad forgive me.