Because he was a thoroughbred champion race horse! From the U.S. if I may add.
Answer:
I suppose, It can be known as a Pardon
Explanation:
A pardon is a government decision to allow a person to be absolved of guilt for an alleged crime or other legal offense, as if the act never occurred. The pardon may be granted before or after conviction for the crime
If you are asking about the first president of the United States, the answer is George Washington.