The Monroe County Sheriff's Office said a caretaker for a house on Sugarloaf Key called 911 Sunday evening and reported seeing someone sitting on a couch inside the house, the South Florida Sun-Sentinel reported Monday.
Deputies said they arrived to find the house unoccupied, but they discovered an open back window, empty food containers and marijuana left on a coffee table.
The sheriff's office said deputies found a computer logged into the MySpace account of Robert Rupp, 18, of Big Coppitt Key.
Rupp was spotted walking in the neighborhood and he allegedly told deputies he went inside the house because he was cold outside.
Rupp was charged with burglary, possession of burglary tools and theft.