Schmerber Doctrine
Definition
The rule from Schmerber v. California (1966) that a compelled blood draw does not violate the Fifth Amendment privilege against self-incrimination because blood is real, not testimonial, evidence. The Fourth Amendment search-and-seizure framework still applies, requiring a warrant or valid exception.
- Case
- Schmerber v. California, 1966
- Fifth Amendment holding
- Blood is real, not testimonial, evidence
- Fourth Amendment implication
- Warrant or valid exception still required
- Applies to
- Compelled blood draws in the US
Common questions
If the Fifth Amendment doesn't block a blood draw, what still can?+
The Fourth Amendment's protection against unreasonable search and seizure still applies, so law enforcement generally needs a warrant, valid consent, or a recognised exigent-circumstances exception before compelling a blood draw.
Does Schmerber apply to breath tests the same way?+
Later case law has treated breath and blood tests differently, since a breath test is less physically invasive, so the exact warrant requirements have diverged for the two methods in subsequent Supreme Court rulings.
Related terms
- Bodily Autonomy
- The principle that a person has sovereign control over their own body and cannot be subjected to physical interference without their consent...
- Intimate Sample (PACE)
- Under the Police and Criminal Evidence Act 1984, a sample of blood, semen, or any other tissue fluid, urine, or pubic hair,...
- Medical Examination Order
- Under the Bharatiya Nagarik Suraksha Sanhita 2023, a court or magistrate may direct that an accused person be examined by a registered...
- Non-Intimate Sample (PACE)
- Under PACE 1984, a sample of hair (other than pubic hair), nail clippings, saliva, a swab from a non-intimate external body surface,...
- Testimonial Evidence
- Evidence that communicates a fact through the suspect's own mental process or assertion, for example a confession, a password, or a document...