Published Sunday, 15 November 2009
The 51-year-old was taken into custody after being arrested in the county Antrim area but was later released without charge.
Sappers Patrick Azimkar, 21, from London and 23-year-old Mark Quinsey from Birmingham were shot dead outside the barracks.
They were the first soldiers to be murdered in Northern Ireland in 12 years.
Prominent Lurgan republican Colin Duffy, 41, is one of two men already charged with the murders.
He has been in custody since March.