Published: Oct 05, 2012 5:36 PM EDT

PORT CHARLOTTE, Fla.- Charlotte County Sheriff's detectives arrested two girls, ages 11 and 13 on felony Burglary and misdemeanor Petit Theft charges after they entered a school, hid out inside until everyone left and spent the night.

CCSO received missing juvenile reports on Sep. 17 around 4:30 p.m. about the two Port Charlotte Middle School girls who never came home that afternoon. Deputies and detectives began a big search around the county for the missing girls and later learned that the 13-year-old was communicating with friends on Facebook from a computer. She was giving false information where they could be found at locations in Charlotte County and Fort Myers; all the locations were checked and they were not found.

The next morning (Sep. 18) at 6:15 a.m. deputies responded to the 11-year-old’s home as both girls were located. The father received a tip that both girls wanted to come home and needed a ride from Neil Armstrong Elementary School.Savich’s father told detectives he located them outside the school, drove them to his home, and called CCSO.

The detective’s investigation learned that the two girls snuck into Neil Armstrong before the school dismissed; a student let them in a door and they hid in the girl’s bathroom until everyone left. That night they snacked on items found in the school. They also began makingprank callsto six teachers from the school phones, thenused school computers to access numerous websites on the internet; they also used the school printers. That is when they started sendingmessages on Facebook to their friends giving false info as to where they were sending law enforcement in Charlotte and Lee counties scrambling to locate the missing girls.

The school principal told detectives she received a call early that morning from the head custodian who said he got a call from the school alarm company around 5:30 a.m. about a security breach at the school. The custodian said he found one of their father's knocking on a side door desperately looking for his juvenile daughter. That is when the custodian learned both girls were inside, had spent the night, and contacted a family member asking for a ride home.

School security and officials were able to supply detectives with surveillance videos showing most of the movements of the two girls in the school, their running in the hallways, and entry into several rooms. Detectives also obtained internet browsing history records made on the school computers and phones. The girls were arrested Friday and booked into the Charlotte County Jail; they were then released to their parents pending a mandatory detention hearing tomorrow (Oct. 6) in Lee County.