I'm on Hard Answers part of the Thieves Guilds main quest. I'm at the part where i need to Obtain Calcelmo's Falmer Translating Guide. When i enter the second room in Calcelmo's Laboratory there is a Markarth City Guard there that is always trying to arrest me. I've left the area and came back later and also payed the fine (5 gold coins, for stealing an item even though I don't have any stolen items on me). I'm playing on the PS3