As reported by the Chicago Tribune, 17-year-old emcee RondoNumbaNine, whose real name is Clint Massey, has been arrested on murder charges stemming from the fatal February shooting of dispatch driver Javan Boyd. An unnamed co-defendant has also been arrested, and they're currently being held on $2 million bail. 

The incident allegedly took place near Chicago's Wentworth Gardens in the early hours of the morning on February 22, Boyd having been shot seven times while waiting for his next passenger. He was pronounced dead two hours after being taken to hospital. Police claim to have found Massey's fingerprints on the vehicle, and are also in possession of partial video footage of the murder. Witnesses also claim to have seen Massey and the co-defendant shoot into Boyd's vehicle with handguns. 

This comes after a wave of scrutiny Massey recently faced for posting a picture of himself holding a rocket launcher last December, which caused the Chicago Police Department to order official an alert. He later claimed it was a "just a publicity stunt".

RondoNumbaNine was recently co-signed by Lupe Fiasco, the two having collaborated on his November 2013 single "Life Of A Savage", which you can listen to below. He's also affiliated with Fredo Santana and Lil Durk.