Police said Tuesday it has launched a murder investigation into the death of a young girl found on a railroad track in central Japan, suspecting she was killed before being hit by a train.According to the Niigata prefectural police, an autopsy found that the 7-year-old girl, later identified as Tamaki Omomo, was choked to death.Earlier in the day, the police said the girl was found dead after being struck by a train Monday night, but bruises on the elementary school girl's face suggested the possibility she was strangled sometime before.The girl was an elementary school second-grader in Nii…READ FULL ARTICLE