Wiltshire Police have been searching 4, 500-acre Savernake Forest, near Marlborough, for signs of Miss O'Callaghan because mobile phone records put her telephone in that area soon after leaving the nightclub.
The 17-year-old former Oak Park and River Forest High School student, who police and school officials are not identifying because he is a minor, was arrested at his Oak Park home Monday night and was charged with misdemeanor disorderly conduct.
Berlin (CNN) -- The story of the so-called Forest Boy -- a riddle that has perplexed people in Germany and elsewhere for months -- is a lie, police in Germany said Friday.