Why do guards show up when I steal things from an empty house

the-elder-scrolls-v-skyrim

I'm in a room of a house and I steal stuff. The only other person in the room is my follower, so I think no one will find out. However, a guard shows up.

Why?

For example, in the House of Grey Mane:

No one else is there when I steal things, except my follower, but a guard shows up anyways.

Best Answer

Some followers will still put a bounty on your head if you steal or trespass. And if the guard comes In, that means there already chasing you. Followers can't call guards but can still put bounties on your head. The only other way they could come in, is if someone saw you pick the lock to break in, therefore they will call guards. Oh, and if someone sees you trespass and is not your friend, They will call the guards, Regardless if you leave or not.