Scary Call in Zone 2

According to the  teen daughter, she is home alone in the garage when the front door opens and the alarm goes off.  She exits the garage and heads over to a friend's house.  The parents are called as well as the PD.  Numerous officers roll code to the house and set up a perimeter.  Mom shows up and says nobody should be home or have a key.  In the end the house and yard are searched with no intruder located.  Video checked later indicates that no one was at the front door.  I hope this was an honest mistake, but teens have made up stuff to justify their presence at a friend's house and not at home.