In 1971 , Coen was imprisoned in Mountjoy Prison , Dublin , where he was jailed with fellow Republican Dan Hoban .
Coen joined the IRA and served with the Sligo Brigade and was a member of the Southern Command .
In 1971 , Coen was imprisoned in Mountjoy Prison , Dublin , where Coen was jailed with fellow Republican Dan Hoban .
Coen joined the IRA and served with the Sligo Brigade and was a member of the Southern Command .