Final answer:
A jailer guilty of willful inhumanity or oppression resulting in substantial bodily harm to a prisoner could face a criminal abuse or battery charge, which is a serious offense under the law.
Step-by-step explanation:
The question at hand involves an incident where a jailer is guilty of inflicting willful inhumanity or oppression upon a prisoner. This type of conduct, especially when it results in substantial bodily harm to the prisoner, could be classified as a serious criminal offense, potentially criminal abuse or battery, depending on jurisdictional law. In many legal systems, officials, including jailers, are held to high standards with respect to human rights and the treatment of individuals in their care. Intentional misconduct that harms a prisoner can lead to severe legal consequences.