No, all drug laws that I am aware of require intention or knowledge. (In fact what laws call mens rea, culpable mental state, is required for almost all crimes; strict liability crimes are few and far between).
If you really don't know what is in the package you are not guilty of posssession with intent to distribute or the equivalent. Nor can the mental state requirement be satisfied even if you should have known. The requirement is that you know what's in the package.
The only exception to this rule that I know of in federal law is what is called "willfull blindness," where deliberately avoiding knowledge that you should have had is treated as equivalent to knowledge, like I case I was involved in once where a guy was selling fake Michael Jordan-signed memorabilia, and there was so much stuff involved that if Jordan had signed all that crap he would not have had time to play basketball.
You will say -- every nonlawyer does (I forget whether you are a lawyer) -- you can't _show_ what's in people's minds. Of course you can. That's what lawyers do all the time. It's our job. You assemble evidence and make a case. Or you don't make a case, and then the defendant is acquitted or found not liable. That doesn't mean there aren't errors.
> It is also possible to
> convict you of being part of a criminal conspiracy
> on these facts.
For conspiracy you need agreement to commit an unlawful act, which implies knowledge or intention to commit it. Accepting a package without knowing that it contains drugs would not qualify unless you were wilfully blind.
If that
> criminal conspiracy had been involved in violence
> then for accepting that
> package at the door you are by definition a violent
> criminal.
>
Well, if you're in the Soprano family, and you agree to a hit to be committed by Silvio (say), and in some cases (not drug crimes in federal law) take a signifigent step towards furthering the aim of the conspiracy, such as supplying the gun or something like that, then you have conspired to commit murder, right?
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