The defense for convicted Boston Marathon Bomber Dzhokhar Tsarnaev has started to wrap up its case, tying up lose ends in the sentencing phase of the federal death penalty trial against him. Today, in Day 28, Boeri and Cullen discuss the testimony from a relative in Kazakhstan, adolescent brain development, and the supermax prison where--if spared the death penalty--Tsarnaev could spend the rest of his life.