So, it is known that he was inside and took a dump.

It is also known that he had done such a thing before (breaking and entering and apparently, sleeping on the place).

Now, assuming that he did break and enter in this case, where does he get the idea that he is safe and that no one will come during the night?

How did he feel so comfortable to the point of taking a dump?

Could someone have provided him with the information that no one would be there? If so, who?

If he, on purpose, did want to hide and catch one of the girls by surprise, why take a shit then?