For nearly eight weeks, investigators in Massachusetts have been struggling to solve a mystery: the identity of a little girl whose remains were found on a Boston Harbor shoreline.

The case started on June 25, when a woman was walking with her dog at about 1 p.m. on Deer Island. The animal bounded away from her on the rocky shoreline to sniff a black trash bag. The woman peered into the bag and, with a quick glimpse, realized it contained a body. She alerted a bystander, who called the police.

The medical examiner found that the girl was about 4 years old, with brown eyes and brown hair that was about 14 inches long.

Her height was just over three feet, and she weighed about 30 pounds. She had pierced ears. She was wearing white leggings with black polka dots. Also in the bag was a zebra-print blanket that investigators believe may have been special to her.