The Federal Bureau of Investigation said that it was examining an Islamic State flag that was found in the truck used in the attack and that it believed the Mr. Jabbar “was not solely responsible.” Several improvised explosive devices were found and disposed of, officials said.
Mr. Jabbar, who officials confirmed was honorably discharged from the Army, had converted to Islam at some point, according to Dwayne Marsh, who is married to Mr. Jabbar’s ex-wife Nakedra Charrlle. Mr. Jabbar and Ms. Charrlle had two daughters, ages 15 and 20, Mr. Marsh said, adding that “the girls are a mess” after the attack.
In recent months, he said, Mr. Jabbar had been acting erratically, “being all crazy, cutting his hair” after converting, Mr. Marsh said. Mr. Marsh and his wife then stopped allowing the daughters to spend time with Mr. Jabbar, he said.
In a YouTube video from 2020 that appears to have been posted by Mr. Jabbar, he spoke positively about his skills in real estate. He said he had been born and raised in Beaumont, Texas, and had served in the U.S. military.
“I’ve been here all my life, with the exception of traveling for the military,” he said. Court records from his first divorce, in 2012, list his employment as active duty with the U.S. Army and his residence at the time as Fort Bragg, in North Carolina.
In the video, Mr. Jabbar said that in his 10 years in the armed forces, he had worked as a human resources specialist and an information technology specialist.
Criminal records in Texas show that Mr. Jabbar had previously been charged with minor infractions — once in 2002 for a misdemeanor theft and once in 2005 for driving with an invalid license.
The vehicle used in the New Orleans attack, an electric Ford pickup, was registered to a Houston man who made vehicles available for rent on a peer-to-peer car sharing website. That man, who asked that his name not be made public, said that he and his family had been preparing for an outing to the zoo on Wednesday morning when he saw the news of the attack and recognized his truck as the one involved.
The man said the F.B.I. called him and he explained that he had not been driving the vehicle but had rented it out. He said he had been asked by the federal agents not to discuss the matter publicly.
Records show that Mr. Jabbar was married twice, with his first marriage, to Ms. Charrlle, ended in 2012. In the midst of a second divorce in January 2022, Mr. Jabbar wrote an email to his wife’s lawyer in which he described financial problems. “I cannot afford the house payment,” he wrote.
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