A man in his 20s was arrested Monday in connection with the murder of a 7-year-old girl whose body was found on a railroad track last week in the central Japan city of Niigata, police said.The man, an office worker who lives in the same neighborhood as the victim Tamaki Omomo, a second-grade elementary school student, was arrested on suspicion of abandoning her body. He has admitted to the allegation and hinted that he killed the girl, investigative sources said.The police spotted him Monday morning in the city before they started questioning him on a voluntary basis.An autopsy found the gi…READ FULL ARTICLE