One of the six men arrested after the gang rape of a student on a Delhi bus has been accepted as a juvenile offender, a decision that has upset the student’s family, and rejects a police attempt to run a bone test on the suspect to determine his age.

The Juvenile Justice Board accepted a school certificate that declares his age as 17 years and six months as authentic. The police has described him as “an equal participant in the crime” in its report submitted to the Juvenile Board.