I went and got my dad and he closed the door, and it locked. Then my dad went back to our house and my mom came, she talked to the other neighbor about what could have happened. Then when my brother and I were next to the the other back door catching frogs, I heard a thud in the house. When I looked at the second back door I saw the Knob move. I quickly grabbed my little brother and we ran to the our mom. I told my mom and the other neighbor that I heard a thud in the house, and that I saw the door knob move. The other neighbor called the cops, and three police cars came. (Just to let you know, when the door knob moved it didn't open the door, the door was locked. He could have unlocked it from the inside, but when he heard me and my little brother he probably didn't want to go out there. When the cops came they had to break into the house to try to find the guy. They never found him, but they didn't see anything moved around our looked through.