[MosesKnows]

detects drugs in a driver's system using a saliva swab

Why is this and other detection system not a violation of a citzens fifth amendment right to not be compelled in any criminal case to be a witness against himself?

[JTN]

Why is this and other detection system not a violation of a citzens fifth amendment right to not be compelled in any criminal case to be a witness against himself?

Because the drug war is immune from the Constitution.

[coloradan]

You sign away your right to medical privacy when applying for a driver's license, even when it comes to alcohol use: "implied consent" to be subject to a breathalyzer. You don't want to? Fine, don't get a driver's license. (At least, that's the government's take on the situation. And, it's why my premonitions in post #4 don't have any argument against them, unless something big changes in the way the government views its licensing powers.)

[Sandy]

Why is this and other detection system not a violation of a citzens fifth amendment right to not be compelled in any criminal case to be a witness against himself?

The Fifth Amendment "privilege" is a protection against forced communications or testimony. Forcing a suspect to give real or physical evidence does not violate that privilege.

Or so they say. Schmerber v. California