One of the first civilian witnesses was Allen Feraday, the principal scientific officer at the Royal Armaments Research and Development Establishment. He suggested that a remote detonator could reach from the scenes of the shootings to the car park in which Savage had left the white Renault and beyond. On cross-examination, he stated that the aerial on the Renault was not the type he would expect to be used for receiving a detonation signal and that the IRA had not been known to use a remote-detonated bomb without a line of sight to their target. The following day, "Soldier G" told the coroner that he was not an explosives expert,Crawshaw & Holmström, p. 89. and that his assessment of Savage's car was based on his belief that the vehicle's aerial looked "too new". McGrory called Dr Michael Scott, an expert in radio-controlled detonation, who disagreed with government witnesses that a bomb at the assembly area could have been detonated from the petrol station, having conducted tests prior to testifying. The government responded by commissioning its own tests, which showed that radio communication between the petrol station and the car park was possible, but not guaranteed.Eckert, pp. 215–220.
