Below what age did American law prohibit the execution of children at the time the Bill of Rights was ratified in 1791?

Below the age of 17 the American law prohibit the execution of children at the time the Bill of Rights was ratified in 1791.

Explanation:

In 2008 a total of 210,325 sentenced prisoners were beneath federal administration.In colonial eras were prevented with the approval of the U.S. Constitution and its Bill of Rights.Capital execution of any person who is under the age of 17 years While that law was approved in 1791, the U.S. Supreme Court did not implement it to and halt the killing of criminals who engage their offenses before age 18 years.