It stands to reason that having someone killed because they are a threat to a crime family has little value if it does not send out a signal to others who may be inclined to also reveal information which is a threat to that crime family.
Someone being murdered in the course of a robbery where nothing was taken even though much easy access wealth was on the victim’s person is one example. Or a suicide note which specifically states: “No foul play whatsoever was to blame”. Clearly the idea was to signal anyone connected to any given crime family that an attempt to betray the nature of the family’s crimes and deceptions to the general public would have lethal consequences.
Is the United States a nation of laws? Or is it a kleptocracy like so many third world nations and an increasing amount of Western nations?