Federal prosecutors have charged Melvin Doyle, the father of Chicago drill artist Mello Buckzz, with illegally possessing and trafficking firearms only days after his daughter’s album-release party was struck by a mass shooting in the city’s River North neighborhood. A criminal complaint unsealed in U.S. District Court alleges Doyle, 49, sold 13 guns to undercover informants between early May and his arrest on July 7, including three pistols he delivered for $3,000 two blocks from his South Side home. Agents with the Bureau of Alcohol, Tobacco, Firearms and Explosives say they recovered a holster and $1,100 in cash when they detained him in his SUV after the transaction. Although investigators say the weapons case is separate from the July 2 attack outside the River North lounge—where a drive-by shooter killed four people and wounded 14—authorities cited fears of gang retaliation. No arrests have been made in the shooting, which targeted guests leaving the rapper’s party. Mello Buckzz, who has ties to the South Side faction NLMB, has said two of the victims were close to her. Doyle, whose prior convictions include attempted murder and narcotics offenses, made an initial court appearance Tuesday. Prosecutors are seeking to hold him without bond ahead of a detention hearing scheduled for Friday.