I would like to know how Skyrim determines whether I was detected killing someone. For example: There is this temple in Markarth, where there are some women down below the main hall. I lockpicked my way there, they stopped me and things ultimately led to a fight. I killed them, nobody was around to see it, yet when I came out of the temple, the guards were all over me...
I wasn't in stealth when fighting, because there were no witnesses whatsoever, so why was I still considered a killer?