There certainly would be very few, and likely none, murders to obtain cocaine by end users. It does not cause dependency in a way heroin and gabaergics do.

Heroin withdrawals are quite painful (literally), and many users are also simply suffering from endogenous depression that responds to almost nothing, and in fact used to be treated by morphine.

Same goes for alcohol and benzo withdrawals that WILL give you seizures and quite possibly death.

Psychostimulants (cocaine, amphetamines, cathionines, other assorted alkaloids, including caffeine) withdrawals means being very tired, lethargic and sleeping a lot, they are not life threatening.