The FBI released new photos of Shamsud-Din Jabbar, taken an hour before the deadly attack on Bourbon Street in New Orleans.
The incident on New Year's Day resulted in at least 15 fatalities and dozens of injuries, classifying it as one of the most devastating terror attacks in U.S. history.
Jabbar, a Texas citizen and Army veteran, used a rented white Ford pickup truck to strike a crowd before engaging in a shootout with police.
In his vehicle, authorities discovered an Islamic State flag and potential explosives, indicating possible ISIS influence on the suspect.
President Biden noted that Jabbar had expressed a desire to kill via social media shortly before the attack, and investigations are ongoing concerning any links to another recent attack.