The state agency is brought in when there is suspicion of physical, mental, or emotional abuse of a child, according to Brockton police Lt.

CNN: STORY HIGHLIGHTS

Texas Child Protection Services confirmed it had received allegations of physical abuse and neglect and was investigating, but had not yet determined whether the allegations were true.

BBC: Russia investigates 'murder' of Max Shatto, US adoptee

As his files documented, as a child he suffered from poor nutrition, severe parental neglect, sustained physical and sexual abuse, early head injuries, learning disabilities, poor cognitive functioning and lead exposure.

WSJ: Neurocriminology: Inside the Criminal Mind