One individual was released and another was booked on unrelated charges after police questioned the two in connection with the June 29 shooting on Bourbon Street.
Officials emphasized that the man they took into custody is not a suspect but a person of interest who may have information that could help detectives.
The arrested man's name was not released "due to the complexity of the ongoing investigation," according to an NOPD statement issued early Friday morning. The man was booked into Central Lockup on outstanding warrants, police said.
Justin Odom, an individual previously named as a person of interest in the case, was released from jail Thursday after being arrested on outstanding attachments in Jefferson Parish, according to sheriff's spokesman Col. John Fortunato.
Odom, 21, of Marrero, turned himself in to Gretna Police Wednesday afternoon. NOPD homicide detectives interviewed Odom with his attorney present.
Anyone with information that could help investigators is asked to call NOPD homicide detectives at (504) 658-5300 or report anonymously to Crimestoppers at (504) 822-1111.