A 23-year-old man arrested in connection with the death of a 7-year-old girl in the city of Niigata has admitted to killing her, an investigative source said Tuesday.Police believe Haruka Kobayashi abducted Tamaki Omomo on her way back home from school, strangled her to death and abandoned her body on a railway track, the source said.The suspect, who lives in the same neighborhood as the victim, initially told investigators his car "collided" with her but an autopsy found she had been strangled to death.Kobayashi was arrested Monday on suspicion of abandoning and damaging the body of the se…READ FULL ARTICLE