The notorious gangster was shot dead exactly one week ago today at the Asda supermarket in Robroyston, Glasgow.
Three masked gunmen shot the father of two five times as he sat in the back seat of a black Audi outside the busy shop, before fleeing the scene in a Volkswagen Golf. The Golf was discovered abandoned in Airdrie last Friday.
It had been stolen the previous September and had been given cloned number plates.
A spokeswoman for Strathclyde Police said last night: "The investigation is ongoing and police will be at Asda handing out leaflets about the crime and seeking new eye-witnesses."