In islamic jurisprudence if a child was made to commit an offence he would be punished. Not the way the one who hired or forced him to do it would. The child would be given a punishment to deter him not to do it again but the one who will either face death or amputation of limbs is the one who masterminded and made the child do it.Especially if the crime committe resulted in the death ot severe injury of the victim.