If two or more persons conspire to commit any crime defined by this chapter, each is guilty of conspiracy and subject to the same punishment as if he had committed the crime which he conspired to commit, whether or not any act be done in furtherance of the conspiracy. The fact that any of his fellow conspirators has been acquitted, has not been arrested or convicted, is not amenable to justice, or has been pardoned or otherwise discharged before or after conviction does not constitute a defense or ground of suspension of judgment, sentence, or punishment for any person prosecuted under this section.