The band was indicted earlier in March.
“The members of Sigur Rós are musicians — not experts on bookkeeping and international finance,” says the band’s lawyer.
The rapper was sentenced to a year in prison for tax evasion back in March.
The Jersey Shore star pled guilty to filing bogus tax returns and concealing income.
The rapper’s attorney played the “Slippin'” video for the judge before his sentencing.
While under investigation, assets totaling $8 million were frozen.
U2 frontman has been outed as an investor in a Lithuanian shopping center through a Maltese company.
The New York rapper put on the weight in rehab while facing a tax evasion case.