Neighbors found the infant Tuesday, after hearing a sound coming from their trash can.
The St. Mary Parish Sheriff's Office reports that a 14-year-old boy has been arrested and charged with rape.
A rape of a 12-year-old girl was reported on August 16, 2013. During the investigation, detectives learned that the girl was raped by the boy in May of 2013.
The boy was arrested Friday just before 10 p.m. He was taken to the Assumption Parish Juvenile Detention Center.
The juvenile's name was not released because of his age.
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