Department officials initially redacted the reference to the terror group and its leader when the exchange was released Monday but abruptly changed course following a wave of criticism from Republican leaders....

Later, in a joint statement, Justice and FBI officials said they relented because the redactions had "caused unnecessary distraction'' from the work of law enforcement authorities.

"We also did not want to provide the killer or terrorist organizations with a publicity platform for hateful propaganda,'' according to the statement.

President Obama himself has repeatedly said that the shooter pledged allegiance to the Islamic State, most recently in his weekly radio address Saturday. “During his killing spree, he pledged allegiance to ISIL, a group that’s called on people around the world to attack innocent civilians,” Obama said of the gunman.