Comment by hex4def6

Citation needed. A kid that's 15.5 yrs old is more than able to be unsupervised for a few hours. c'mon.

The only state that I can find with the oldest age defined is 14 in Illinois (but it's defined as "for an unreasonable period of time").

Most states otherwise don't define it (~38 states), and of the ones that do, it's between 6-10.