Police are investigating whether Ja Morant broke the law when he appeared to be pictured holding a gun in a Colorado nightclub last weekend.
Morant was suspended by the Memphis Grizzlies after he posted an Instagram Live video which seemed to show him brandishing a gun.
The Glendale Police Department confirmed to the Associated Press that the incident is being investigated.
It is not against the law to carry a gun in Colorado, but there are exceptions to the rule, one of which being you must not be in possession of one while under the influence of alcohol.
Morant, the 2022 NBA Most Improved Player, was not seen to be drinking during the footage.
In a statement released to ESPN shortly after his suspension was confirmed, Morant apologised for his actions, saying he took "full responsibility".
"I'm sorry to my family, team-mates, coaches, fans, partners, the city of Memphis and the entire Grizzlies organisation for letting you down," Morant added.
"I'm going to take some time away to get help and work on learning better methods of dealing with stress and my overall well-being."