The ancient city of Chester, Friday night, and the weekend starts here. High summer, skimpy fashions, short skirts, tight jeans, it's a hot night, and the town's relaxed. It's 11pm and the pubs are beginning to close. The band has just finished playing; packing their instruments away, but the night is young. A young man enters the still crowded pub. Walks up to the small stage. Pulls out a handgun and empties four shots into the lead singer. One,...