Murders are a function of the number of community organizers.
It would be interesting to see murders broken out by race if good data is available across the entire date range.
I had a friend who became a cop in a fairly large Deep South city in 1967. Black population about 22%. He retired in 1992. When we first met I asked him whether the following was true: When you started in ‘67, the ER at the county hospital (where the uninsured went) on Saturday night was populated with young black males suffering from stab wounds; twenty five years later (1992), that same ER on a Saturday night was filled with young black males suffering from gunshot wounds.
He answered with one word: Yep.
Upward mobility means pistols instead of kitchen knives.