Places and times with the strongest gun-control laws have often been places and times with high murder rates. Washington, D.C., is a classic example, but just one among many.
The rate of gun ownership is higher in rural areas than in urban areas, but the murder rate is higher in urban areas. The rate of gun ownership is higher among whites than among blacks, but the murder rate is higher among blacks. For the country as a whole, hand-gun ownership doubled in the late 20th century, while the murder rate went down.