Portrait emerges of Shamsud-Din Jabbar, accused of New Orleans attack

Texas man, 42, who was killed by police, served in Afghanistan and held rank of staff sergeant

Military records and media interviews are painting a clearer portrait of Shamsud-Din Jabbar, the 42-year-old Texas man accused of crashing a truck into New Year's Day revelers in New Orleans, killing at least 14 people.

Jabbar served in the US army for 13 years, including a deployment to Afghanistan. On Thursday, the FBI said investigators believe Jabbar acted alone when he attacked the busy intersection of Bourbon and Canal streets. Officials had earlier said they believed Jabbar had accomplices.