It's St. Louis. But the key is to recognize what sociologists are coming to understand is "murder inequality." Any discussion of murder rates should focus not on cities, but on the few urban neighborhoods facing vastly disparate murder levels. My daughter and her husband live in Chicago. It's a great city. They love it. But travel a few city blocks, and rates of violence can fluctuate dramatically. In 2016, five police districts overseeing only 8% of Chicago’s population recorded around 32% of its murders. Two Chicago neighborhoods, Burnside and Fuller Park, counted a rate of more than 100 killings per 100,000 people. People living in them were 9 times more likely to be shot in their neighborhood than in some of the city’s safest areas. The same goes for almost any city you can name. Just like income, education and other social metrics, violent gun crime varies even more >>within<< American cities than between them.
The point is, gun control hasn't worked in cities or states where it's been tried.
Overall, we're safer than we were 20 years ago despite the number of guns doubling in the US.