The only way to possibly get a way with it is it would have be very very carefully planned
And the guy would just have to disappear
The body can never be found

And forget about ordering it
You would have to do the hit yourself
So no one will tell on you

Other than that look at the last few murders they have all gotten caught

The real question is how many unsolved since 2000?
I know of one Bonnano that killed at the bus stop in Staten Island

Any others in NY