A really telling example is Baltimore. Baltimore City in 2015 had 244 homicide cases. Baltimore City is surrounded by Baltimore County on 3 sides, The Chesapeake Bay and Anne Arundel County cover the fourth side.
Baltimore County had 30 homicides in 2015. Anne Arundel County had 15 homicides.
Sad stats.
Your post reminds me of a recent article here, about how Baltimore City has “an image problem”. And city officials in Baltimore City were concerned about how many families with children, had moved out of Baltimore City in recent decades. And they wanted to take actions to turn around that trend. I think the mayor wanted a movement to get people moving back into to Baltimore
The cold hard facts stated here are one key indicator of why people want to move away.