Mitchell v. State, 301 Ga. 563

Background

Mitchell was stopped after failing to maintain his lane; officer detected alcohol odor, slurred speech, bloodshot glassy eyes, and difficulty with his license.
Mitchell initially refused field sobriety tests and to exit his vehicle; a Fayetteville officer threatened arrest if he did not perform the tests, after which Mitchell complied.
Officer administered HGN, walk-and-turn, Romberg (modified) and declined one-leg stand; officer testified to numerous impairment clues and Mitchell was arrested.
Mitchell moved in limine to exclude field sobriety results, moved to suppress, and challenged OCGA § 24-7-707; the trial court denied motions and this Court granted interlocutory appeal.
The only testimony about the Romberg at the hearing was the officer’s: described procedure, purpose (internal clock, eyelid tremors), reliance on DRE training, and admitted lack of validation studies or an established +/-5 second standard.
The Court reversed the admission of the Romberg results for failure to apply Harper foundation; it affirmed denial of suppression on Miranda/custody and Fourth Amendment/refusal issues and rejected challenges to OCGA § 24-7-707.

Issues

Issue	Plaintiff's Argument	Defendant's Argument	Held
Whether the Romberg balance test is a "scientific" test requiring Harper foundation	Mitchell: Romberg implicates scientific principles (eyelid tremors, internal clock) and needs Harper validation	State: Romberg is a field sobriety/observational test like other non-scientific tests	Court: Romberg is subject to Harper; trial court erred by not conducting Harper analysis
Whether Miranda warnings were required before administering field sobriety tests after threat of arrest	Mitchell: Officer’s statement that he would arrest unless Mitchell performed the tests rendered Mitchell in custody, requiring Miranda	State: Officer did not effectuate an arrest; reasonable person would view detention as temporary	Court: Not custody for Miranda; denial of suppression on this ground affirmed
Whether refusal to submit to field sobriety tests is a Fourth Amendment-protected search (and its use at trial)	Mitchell: Refusal should be treated like refusal to consent to a warrantless search; refusal should be excluded	State: Field sobriety tests are not searches that take tangible evidence; refusal admissible and not equivalent to refusing a property search	Court: Field sobriety tests not a Fourth Amendment search; trial court did not err in admitting refusal evidence
Constitutional challenge to OCGA § 24-7-707 (equal protection/separation of powers)	Mitchell: § 24-7-707 discriminates between civil and criminal expert-admissibility rules and usurps judicial gatekeeping	State: Legislature may prescribe evidentiary rules; existing precedents uphold the statute	Court: Rejected challenges based on Mason and Zarate-Martinez; statute upheld

Key Cases Cited

Harper v. State, 249 Ga. 519 (establishes Harper foundation for scientific techniques)
Belton v. State, 270 Ga. 671 (distinguishing scientific expert matters from lay observation)
State v. Allen, 298 Ga. 1 (standard of review for suppression hearing facts)
Price v. State, 269 Ga. 222 (Miranda required when defendant is in custody for field sobriety testing)
Jones v. State, 291 Ga. 35 (review standard for mixed fact-law issues at suppression)
Mason v. Home Depot U.S.A., Inc., 283 Ga. 271 (upholding differential expert-evidence statutes against equal protection challenge)
Zarate-Martinez v. Echemendia, 299 Ga. 301 (legislature may prescribe evidentiary rules; separation-of-powers analysis)
Cupp v. Murphy, 412 U.S. 291 (distinguishing non-tangible exemplars from invasive searches)
Skinner v. Railway Labor Executives’ Assn., 489 U.S. 602 (taking biological samples is a Fourth Amendment search)
Mara v. United States, 410 U.S. 19 (handwriting exemplars not searches)
Dionisio v. United States, 410 U.S. 1 (voice exemplars not searches)
Maryland v. King, 569 U.S. 435 (DNA cheek swab as search and its analysis)