B&A: Is This Obvious Enough?

Writing about any is difficult but child is extremely difficult and there are not that many authors who can tackle the subject with the sensitivity and the absolute horror it deserves. If you are finding it difficult then leave it to the readers imagination after a certain point as going into detail is not necessarily a good idea. You can always explain what happened afterwards when the police are investigating the crime because crime is what it is. As for the acid bit I would drop that altogether.