Many years ago, when I was young and my hearing hadn’t gone, I was in The USMC.
I had a lot of buddies there that were from various parts of NYC and the surrounding environs.
By listening to their voices I could eventually tell what part of the city they were from, Brooklyn, Staten Island, Bronx, Queens, LI etc.
They could practically tell what street or neighborhood you were from by the accent....
My mother-in-law lives in Melbourne/Palm Bay area and her BF is a retired police detective from the Bronx who also was a detective in Miami..........
Your MIL’s BF sounds like some FL residents we interacted with on a Carnival cruise in 1995. They told my wife and me that both husbands were 20-year retirees from NYPD who came to FL and started a second LEO career with a sheriff’s office. Apparently, this is quite a thing in the frozen north for those that catch on early with a metro PD that has a good retirement plan. Retire early enough to get into another retirement program in FL, live well on the new salary plus retirement in a lower cost location with a more favorable environment, and infect the area with your screwed up ideas on social matters that turned your previous residence into a toilet. What a plan!!