A member of the Trinidad and Tobago Defence Force was one of four people held with an illegal firearm and a quantity of marijuana yesterday.According to police reports officers from the Northern Division Task Force led by Sergeant Pitt and members of the Criminal Gang and Intelligence Unit went to the car park of a supermarket in Arima and searched a car. The officers found 20 lbs of compressed marijuana hidden in the seat along with a nine millimetre handgun.The reigment officer is attached to Camp Cumuto. The other three men are from Balandra and Sangre Grande.All four are expected to appear in court today.