Birdman is under investigation for allegedly plotting to shoot up Lil Wayne's tour bus several years ago.
The Cobb County, Georgia, district attorney told TMZ that Young Thug is also being investigated for a potential role in the 2015 shooting.
Back in 2015, Weezy was leaving a performance at an Atlanta on his tour bus around 3:30 AM. Just after the bus pulled away, gunfire erupted. No one was injured.
Police eventually nabbed the shooter and a judge sentenced him to 20 years. TMZ said in 2015 that the shooter, Jimmy Carlton Winfrey, "used a cellphone after the shooting which was owned by Birdman." The shooter was Young Thug's road manager.
At the time, Lil Wayne and Birdman had been feuding about money, some of which was centered around Wayne's Tha Carter V album, which was just released on Friday.