Who was Shamsud-Din Jabbar, suspect in New Orleans attack?

Shamsud-Din Jabbar, a 42-year-old former U.S. Army veteran, is accused of a deadly New Orleans truck attack that killed 15 and injured dozens. A decorated soldier with service in Afghanistan, Jabbar's life spiraled into financial struggles and alleged radicalization. Authorities link Jabbar to ISIS-inspired motives, citing extremist videos and a black flag found in the vehicle.