The reports provided for in this chapter shall state, if known, the name of the child, his or her whereabouts, the names and addresses of the parents, guardian, or caretaker, and the character and extent of his or her injuries. The written report shall also contain, if known, any evidence of previous injuries to the child and any other pertinent information which might establish the cause of such injury or injuries, and the identity of the person or persons responsible for the same.