<human>: Can you give me the gist of the text in a nutshell?

Theres a neighborhood and a half built house across the street that's right behind my house. The people who were building it ran out of money a year ago, so the place has just been sitting around. A few weeks ago, my brother snuck into the abandoned house late at night to sleep over. He heard a man say "hello" and shuffle around before he ran back. We have a fence in our backyard leading to the road that isn't locked often. A week ago we noticed that everyone was missing something that could not be found or explained. The missing items are: a black and white kindle, ipod touch, picture in a frame of my mom and her friends, bowls and spoons, and all of the mugs that are plain and don't have pictures of kids or are marathon / new york souvenirs. My mom always locks the doors at night, but I found a door leading outside that's never used unlocked and the doors were not locked one night when I didn't get home until 5am. Am I coming to insane conclusions?  What should we do?
<bot>: Theres a squatter living in an abandoned house behind my house. We've noticed many things have mysteriously dissappeared recently. Could the squatter be stealing from us? What should we do?