Anthony Montgomery-Wilson and Preston Powell, both of Chicago, were indicted by a grand jury about a year ago in Mack's murder. The FBI linked Montgomery-Wilson and Powell to Durk using texts, confidential informants, phone call metadata, and social media posts—such as one reading, "Did Durk give U that money?"

Lil Durk, real name Durk Banks, was expected to appear Thursday in Los Angeles, where he faces federal charges stemming from an August 2022 shooting there that killed the cousin of rival rapper Quando Rondo — the target of the attack.