Buggs was accompanied by another man who police also took into custody, Mohammed told the paper.
Buggs allegedly shot Brownlee, an ex-con who killed two men himself in the 1980s, three times after an argument in the 2018 incident.
The dying victim told responding officers he knew who shot him but refused to say who it was. Investigators closed in on Buggs, a suspected drug dealer, within days anyway.
More recently, he cursed out a Brooklyn judge who denied his bail application at a hearing in February, then received a contempt of court order.
"Suck my d---, you f------ f-----," he told the judge during a virtual hearing, according to the Post report.