John Yoo writes for The Wall Street Journal, August 8, 2013 (registration required)
The mishandling of Mr. Tsarnaev’s interrogation is clear. If the Obama administration had held Mr. Tsarnaev as an enemy combatant, it could have continued its questioning so long as it kept the answers out of any future trial. But trapped by an ideology that sees terrorism as a law-enforcement problem, the administration limited questioning only to imminent dangers and crimes but not the suspect’s broader network and training.