It wasn't legaly binding and was available for individual interpretation, which resulted in the notion of equality not including African-Americans, Native-Americans, and women. Those three groups were very affected by this since they were either enslaved or had no rights and could only be housewives.
When trying a minor we need to think about all different aspects of the childs developmental habits.
Does the child have a learning disability?
Are they at an age that is not fully developed so they may not have realized what they were doing?
The future is the children and the younger generations, so how can we expect to lock them away for their entire lives and in doing so possible cost the world one of the advencements this child may have made?
There should be some form of a contingency plan on the lifetimes sentence, especially for children under the age of 13.
Good Luck! I hope some of these help!