An internal investigation of alleged misconduct by a senior ranking Garda is underway at Killarney Garda Station. It`s understood the allegation centres around a drink driving case. The inquiry is being carried out by a Chief Superintendent from outside of the county. Radio Kerry News has learned that another senior ranking Garda is helping the Chief Superintendent with his enquiries. It`s expected that the probe into the allegation will be finalised in the next week.