So i got to the part in The Forsworn conspiracy quest in Markarth, and when the three guards appeared at the end i didn't choose to go silently, in fact i went on a rampage and fled Markarth. Now this is where the bug starts, when i returned to markarth and got stopped by a guard, first I said i was framed and he shot the idea down, then when i pressed i submit take me to jail, he said "no one escapes from cidna mine" and then the conversation made a loop, since the only repluy option i had was "what's the problem?" he returned to the inital reply choices: I was framed, I submit, and I'd rather die. Hence the loop bug. Help please.
tl;dr The guards in markarth's speech loops around and i can't start the No One Escapes Cidna mine quest.
I wish I could help resolve the problem but all I can provide is a link to the two sites that I used when research my specific bug for this quest. The list of bugs on both sites were half as long when I first looked at them so there might be something there that could possible help you. All I know for certain is that I've been avoiding this quest like the plague.
http://www.uesp.net/wiki/Skyrim:The_Forsworn_Conspiracy
http://elderscrolls.wikia.com/wiki/The_Forsworn_Conspiracy