The Omagh bomb trial has been told a detonator now being used in evidence was discovered five years after it was supposed to have been destroyed.
Twenty-nine people died in the Omagh bombing
It was found in an ammunitions box in 2003 by a forensic scientist investigating links between the series of attacks Sean Hoey is accused of.
The unlabelled detonator was from a car bomb attack on Armagh police station in 1998.
Sean Hoey, 37, from Jonesborough, denies a total of 58 charges.
On Wednesday, the trial also heard from the forensic officer responsible for searching the scene of the Omagh bombing.
He told the court that the explosion created a crater three metres wide and almost a metre deep.
The car the bomb was in was thrown 20 metres down the street.
Among the charges Mr Hoey faces is the murder of 29 people in the Omagh bomb attack in August 1998.
The trial continues.