According to police report: 
Sky Boles rented a room to Justin and Jenna the other week and they paid her rent, she also made an agreement to do carpentry work around the house so he and Jenna could stay longer.  She was angry with him for not getting the work done as agreed to and they argued in an upstairs bedroom.  During this argument Justin says that Sky accidentally broke a bedroom window accidentally when she tried opening the window she also hit the window with a backpack which broke the window more.  She called the police and tried stating Justin broke the window in an attempt not to fulfill the rental agreement.