"The Mafia" Logo design

This is what "The MAFIA" "Once you're in, There's no way out" was looking for in their logo design

I am an Area Leader and responsible for 16 business's and 120 people.
We are changing our area name to - "THE MAFIA"
Our slogan will be - "Once you're in, There's no way out"
The meaning behind this for us - is The Mafia will be made up of 4 families working together. We look after our own and build an empire together. Our slogan stands for both staff and clients - once you accept to work for us, you play at our high level. Once a client enquires with us - we need to ensure we are not allowing our clients a reason out of our business without booking.
This is an internal logo within our company and not for public use or visionary.
I would like the new logo to mention both area name and slogan.
colours I had in mind but very open are black with hints of green or hints of blue but very open to design and colour. Read more