Drug laws are pure morality regulation, but laws against murder and theft are the purview of the government because they are protecting personal rights and property rights (the only regulation the govt should be involved in, IMO).
Yes, they can be justified that way as well. But there is certainly a heavily moral component to murder laws -- otherwise, killing someone is self-defense would be difficult to justify. And a rights theory, as Locke wrote, is derived from Biblical injunction. Besides, there are plenty of other laws based on morality: laws barring statutory rape, for example.
The laws against murder and theft are pure morality regulation because they originate with G-d's Commandments, regardless of what a bunch of whacked out proto-Communist 18th century "enlightenment" thinkers came up with through their tortured and silly mental gymnastics.