In 1386 in Falaise, Normandy, France. A pig was sentenced to be ‘mangled and maimed in the head and forelegs, and then to be hanged,’ for having torn the face and arms of a child and thus caused its death. 

Source: https://www.pulse.com.gh/did-you-know-in-1386-a-pig-was-publicly-tried-and-executed-for-murder/tqpy98b