Break down your stats. You cant.. You're going to pull up nationwide stats and that can easily be misleading. Pull up stats from the hot spots across the country, during that time, and let discuss why they all went down.. Thats if you can.
Most places didn't even have high rises, first of all, and the 70s killings happened before they were populated.
Explain LA, DC, and places like Kansas city where most of the killings happened outside of detached single family homes, row houses, and 2 story standard apts?