The Supreme Court has asked gangster Abu Salem to substantiate his claim of having completed 25 years in jail, which would allow his release. Salem, extradited from Portugal in 2005 for the 1993 Mumbai serial blasts, argues his sentence cannot exceed 25 years per extradition terms. The court questioned how he calculated this period since his 2005 custody, considering remission and TADA conviction rules. Salem's counsel will submit relevant prison rules, with the next hearing set for February 9.