It is the deadliest attack by ISIS on the West in several years. But still, almost a week later, the group also known as Islamic State has yet to issue its trademark claim of responsibility for the horrific New Year’s violence in New Orleans.

The New Year’s Day terror attack in New Orleans is a warning that ISIS, and foreign terror groups in general, still have influence in the United States, the Pentagon’s civilian head of special operations said Tuesday.

Recordings and interviews detail Shamsud-Din Jabbar’s growing discontent with American society and increasing isolation even within his local Muslim community.