Akhil Amar and Barry Scheck on Maryland v. King

In a 5-4 decision, featuring a scathing Scalia dissent, the Supreme Court in Maryland v. King held that the 4th Amendment does not prohibit law enforcement from obtaining and testing DNA samples from arrestees.  Last evening, All in with Chris Hayes discussed Mayland v. King with Barry Scheck, co-founder of The Innocence Project, and Akhil Amar, Yale Law School professor.