While Sergio went to work, Tonya took the girls to get more paint. When they returned, the front door wouldn’t open. Tonya went to the back door, which was also shut tight. She called Sergio, who was stuck at work. After kicking in the back door, Tonya was surprised to discover the bolt had been thrown. It could only have been done from the inside. Investigating for intruders, she found the bolt on the front door locked as well. She heard footsteps, but nobody else was there.