Factual error: This movie is set in 1935. Back then, executions were done by hanging. The Louisiana Legislature changed the method from hanging to electrocution in 1940.
Factual error: The cell keys carried by the guards do not date to 1935.
Factual error: When Paul returns home, his wife asks him what the doctor said. He replies "...gobbledygook mostly." The trouble is, the word "gobbledygook" wasn't coined until 1944. This scene takes place in 1935.
Answer: No. Percy is just a typical bully who abuses his power and enjoys picking on people he thinks are weak plus, as a guard, he can do it all he wants without facing any form of punishment.