 This attempted ruse however did not go unnoticed by Michael Collins' informants in the Crown's security forces.On the night of the escape, Detective Constable David Neligan of the Dublin Metropolitan Police's "G" Division was on duty in Dublin Castle when McNamara passed him a telephone message on a police form.The message, issued by the British Military Headquarters, stated that a "Sinn Féin" suspect named Fovargue had escaped from three Intelligence Corps officers in a car whilst en route to prison.