BOSTON (AP) — In her computer-generated image, she is the picture of innocence: a 4-year-old girl with long brown hair, chubby cheeks and expressive brown eyes. Using photos of her remains, the National Center for Missing and Exploited Children created a composite image of what the girl may have looked like when she was alive. [...] image and photos of the leggings and blanket were posted on the Massachusetts State Police Facebook page, investigators were astonished by the number of views and shares the posting received. There were no obvious signs of trauma to her body, and an autopsy performed by the state medical examiner's office did not determine the manner or cause of her death. Investigators have received "dozens and dozens" of tips from the public, and those leads have prompted police to check on the well-being of 20 girls in the same age range. State police spokesman David Procopio said investigators are grateful to the public for "caring about this little innocent."