Bio: McGill was a client of defense attorney Jennifer Walters aka She-Hulk. He had hired She-Hulk because crime boss Bono had framed him for some highly illegal deals that he had made. She-Hulk at one point had a hold of Bono's accounting book which proved her client's innocence, but somehow Bono was able to steal the book away from She-Hulk. Because she had no evidence after this to prove her client was not guilty of the crime's he was accused of, he was found guilty and sent to prison.
Bono WAS eventually convicted of a great number of crimes, but not until the year 2020 when Tanya Yule, a prosecuting attorney, inspired by She-Hulk to become a lawyer, was able to put him away.
It was never specified whether McGill was released from prison at any point, or if he served a full prison sentence for crimes he had not committed.