• FBI identified Shamsud-Din Jabbar as the suspect in the New Orleans truck attack.
• Jabbar, now deceased, was a US citizen from Texas and had a criminal record.
• At least 15 people were confirmed dead, and dozens more were injured.

The Federal Bureau of Investigation has identified the suspect in Wednesday's deadly attack in New Orleans as Shamsud-Din Jabbar.

The agency said Jabbar, who was confirmed dead after a shootout with police, was a 42-year-old US citizen from Texas. His actions are being investigated as a terrorist attack.

At least 15 people are confirmed dead, and dozens more were injured, after the suspect drove a truck into crowds on Bourbon Street at about 3:15 a.m. on New Year's Day. Two police officers were shot but are in stable condition.

The FBI said an ISIS flag, as well as weapons and a "potential" improvised explosive device, were found in the Ford F-150 pick-up truck Jabbar used.

It added other IEDs were found in the French Quarter, and the agency is investigating Jabbar's potential connection to terrorist organizations.

Louisiana Attorney General Liz Murrill told NBC News that "multiple individuals" were involved, and that they had rented a house from Airbnb.

"There was a house fire in New Orleans this morning that was connected to this event where we believe the IEDs were being made," she added.

President Joe Biden said in a press conference that, hours before the attack, Jabbar had posted videos "inspired by ISIS, expressing a desire to kill."

Jabbar's criminal record, obtained from the Texas Department of Public Safety and viewed by Business Insider, shows two prior arrests in 2002 and 2005.

The first was for theft of $50-$500. The other was for driving with an invalid license. Both were classified as misdemeanors.

FBI Assistant Special Agent Alethea Duncan said in a press conference that the FBI does not believe Jabbar acted alone. She did not specify how many additional suspects the agency is investigating.

"We are aggressively running down every lead, including those of his known associates," Duncan said. "We're asking anyone who has information, video, or pictures to provide it to the FBI."

She later added that Jabbar was an Army veteran, and the FBI believes he was honorably discharged.

US military spokespersons told media on Wednesday evening that Jabbar had served in the Army from 2007 to 2015, during which he was deployed to Afghanistan from February 2009 to January 2010.

He filled information technology and human resource roles at the time and was later an information technology specialist in the Army Reserve from 2016 until 2020. He left the military as a staff sergeant.

Jabbar also graduated from Georgia State University in 2017 after studying information technology, per an online résumé reviewed by CNN.

Sean Keenan, a freelance journalist for The New York Times, reported that he had interviewed Jabbar in 2015 for Georgia State University's newspaper. Jabbar told Keenan that he had difficulty adjusting back to civilian life — particularly with getting used to non-military speech.

"You may have a lot of skills and training from the Army," Jabbar was quoted as saying in the article. "But you may not be able to speak the language to really translate it and be understood when you apply for a civilian job."

Jabbar had also complained that bureaucracy in the Department of Veteran Affairs meant he might not receive his benefits if he made small mistakes on his paperwork.

Based on Jabbar's resume, CNN reported that he worked at Deloitte and Accenture, two of the biggest consultancies. A Deloitte spokesperson told Business Insider in a statement that he worked in a "staff-level role" since his 2021 hiring.

"We are shocked to learn of reports today that the individual identified as a suspect had any association with our firm," the Deloitte statement said. "Like everyone, we are outraged by this shameful and senseless act of violence and are doing all we can to assist authorities in their investigation."

Accenture did not immediately respond to requests for comment from Business Insider.

Jabbar also held a real estate license in Texas from 2019 to 2023. He took classes in real estate from 2018 to 2021, per the Texas Real Estate Commission.

Citing court documents, CNN reported he had been divorced twice, although The New York Times reported him as having only separated from his second wife.

His second wife had a temporary restraining order against him granted in 2020, per CNN.

According to the Times, Jabbar was divorced from his first wife in 2012, who has forbidden their two daughters from seeing him. Dwayne Marsh, her new husband, said that in recent months he had started acting strangely.

Jabbar's brother, Abdur, told the outlet that Jabbar had grown up as a Christian but converted to Islam many years ago.

"What he did does not represent Islam," the brother said. "This is more some type of radicalization, not religion."

Chris Pousson, a retired Air Force veteran who went to school with Jabbar and reconnected with him in 2015, told the outlet that he remembered Jabbar as "quiet, reserved, and really, really smart."

Jabbar was always polite and well-dressed, he said, and although he noticed Jabbar writing increasingly religious posts on Facebook around 2015, the latest news is "a complete 180 from the quiet, reserved person I knew."

Turo, a carsharing company, confirmed to BI that Jabbar used a truck rented through its app to carry out the attack and that it is "actively partnering with the FBI."

"We are not currently aware of anything in this guest's background that would have identified him as a trust and safety threat to us at the time of the reservation," a Turo spokesperson said.

The attack comes ahead of three major events in New Orleans, including the college football Sugar Bowl game, which was scheduled for January 1. Officials said it has been postponed 24 hours.

The city also has its annual Mardi Gras festivities starting on January 6 and the 59th Super Bowl scheduled for February 9.