TV Movie,1970's,Thriller,New York? Thug called The King! Crime

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I remember watching this really good film around 1980,I think it was a 70's TV Movie.
Basically the plot was this dodgy estate in America,probably Harlem/New York or somewhere and there was a black criminal who ruled the estate in fear and called himself 'The King'.
He was terrorising the older residents of the estate and one old lady killed herself by slitting her wrists in the bath.
This old man who was also being terrorised made some big metal things that fitted around his wrists so when 'The King' finally attacked him the old man got him in a bear hug and he had fitted a device on the metal 'cufflicks' so they could clip together and he would have 'The King' in a vice like grip unable to escape!
Does anyone remember it?
I would love to watch it again!



freedom ~ peace ~ lurve
There's a 1977 movie about abusive NY City landlords called 'Death Promise'. There doesn't seem to be any character named 'King', but there's an actor in it with the name 'Kang'.

Check out this trailer:



freedom ~ peace ~ lurve
Another possibility is 'Black Caesar' (1973). I can't find a clip that shows how the film ends, so it's difficult to confirm if there's a deadly 'cuff-link' device used against the villain.

Here is the original trailer for the movie: