[jschneier00]

re death penalty age in the USA:

Roper v. Simmons [1] in 2005 raised the minimum age to 18. Before that, Stanford v. Kentucky [2] in 1989 set it at 16.

[1] https://en.wikipedia.org/wiki/Roper_v._Simmons

[2] https://en.wikipedia.org/wiki/Stanford_v._Kentucky