That was so for Keith Robert Caldwell, audited repeatedly over alimony payments he made to his ex-wife.

FORBES: Can IRS Apologize For Frequent Audits?

American Robert Caldwell was found guilty of aiding and abetting the illegal transport of defence articles and served 20 months in prison.

BBC: Christopher Tappin sentenced to 33 months in US arms case

American Robert Caldwell was also found guilty of aiding and abetting the illegal transport of defence articles and served 20 months in prison.

BBC: Christopher Tappin pleads guilty over weapons charges