What is the ruling on a person who severs another's limb to facilitate their subsequent murder by a second party?

Primary text

If the first assailant intentionally severs a limb intending only to hold the victim until a second person arrives to commit the murder, the first assailant incurs retaliation (Qisas) for the limb severance, and their ruling concerning the fatal act mirrors that of one who merely restrains the victim for murder. This is because restraining the victim for the purpose of murder establishes liability for the restraint aiding the killing. If the first assailant did not intend to hold the victim for the subsequent killing, only the penalty for the limb severance applies, similar to one who restrains without knowledge of the ultimate intent.