Mr Spiro told US showbiz website TMZ the legal team will “not stop” until 21 Savage is released.
He also denied ICE’s claims that the rapper has a criminal record. Immigration authorities said on Sunday he was charged with drug offences in 2014, but his legal team say they were subsequently expunged from his record.
Mr Spiro added: “What we have here is someone who overstayed their visa with an application pending for four years – not a convicted criminal that needs to be detained and removed but, by all accounts a wonderful person, father, and entertainer who has a marijuana offence which was vacated and sealed.”
The U visa he has applied for is for victims of crime, after his lawyers said he survived a shooting in 2013.