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South Carolina Supreme Court Announces Penile Plethysmograph Results Are Inadmissible Until Underlying Science Becomes Standardized, Affirming Reversal of Sexually Violent Predator Commitment
by David Kim
The Supreme Court of South Carolina unanimously held that results of the penile plethysmography test (“PPG”) are inadmissible in judicial proceedings “unless and until the science underlying the PPG becomes more fully developed and uniform,” reasoning that the pervasive lack of standardization in administering and …
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More from this issue:
- Your DNA Was at the Scene, But You Weren’t: How Touch DNA Is Convicting the Innocent, by Richard Resch
- Minnesota Supreme Court Announces Heightened Voluntariness Inquiry Required for Contingent Guilty Pleas and Holds Plea Withdrawal Is the Proper Remedy When District Court Fails to Probe Coercion Risk, by David M. Reutter
- Second Circuit Clarifies Limits on Sentencing Court’s Use of Unrelated Co-Defendant Conduct as § 3553(a) “Context”, by David Kim
- Florida Supreme Court Announces “Results” of Postconviction DNA Testing Under § 925.11 Include Underlying Testing Data Necessary for Expert Analysis, Holding That No Additional Burden Applies Once a Motion for Testing Has Been Granted, by David M. Reutter
- U.S. Sentencing Commission: 2026 Amendments to the Federal Sentencing Guidelines, by Richard Resch
- Pennsylvania Supreme Court Announces Calling Known Recalcitrant Witness Before Jury Constitutes Reversible Error and Prosecutorial Misconduct Regardless of Whether Witness Expressly Invokes Fifth Amendment Privilege, Qualifying Contrary Precedent, by David M. Reutter
- Fifth Circuit Announces Enhanced Supervised Release Provision Under 18 U.S.C. § 3583(k) Does Not Apply to Assimilative Crimes Act Offenses, Limiting Statutory Maximum to Five Years Under § 3583(b), by Douglas Ankney
- California Court of Appeal: Vehicle Impoundment Solely to Prevent Further Unlicensed Driving Does Not Satisfy Fourth Amendment’s Community Caretaking Exception; Statutory Authorization Alone Insufficient to Establish Constitutional Reasonableness, by Douglas Ankney
- Ninth Circuit Announces Remmer Presumption of Prejudice Governs When Racially Biased Juror Participates in Deliberations but Is Excused Before Trial Court Accepts Verdict, by David Kim
- Sixth Circuit Announces Predetermining a Supervisee’s Revocation Term of Imprisonment at an Earlier Violation Hearing Renders the Resulting Sentence Both Procedurally and Substantively Unreasonable, by Douglas Ankney
- Massachusetts Supreme Judicial Court Announces Totality-of-the-Circumstances Framework for Evaluating Delayed Traffic Stops Under Article 14, Holding 24-Hour Gap Between Observed Infraction and Vehicle Stop Was Unreasonable, by Douglas Ankney
- California Supreme Court Announces Failure to Challenge Ambiguous Jury Instructions on Imputed Malice in a Prior Direct Appeal Does Not Categorically Bar Resentencing Relief Under Penal Code § 1172.6, by David Kim
- South Carolina Supreme Court Announces Penile Plethysmograph Results Are Inadmissible Until Underlying Science Becomes Standardized, Affirming Reversal of Sexually Violent Predator Commitment, by David Kim
- Fourth Circuit Announces ICE’s Execution of a Removal Warrant Following a Final Removal Order Does Not Constitute a “Pending Proceeding” Under 18 U.S.C. § 1505, Vacating Noncitizen’s Obstruction Conviction in Issue of First Impression, by Douglas Ankney
- SCOTUS Announces Sentencing Disparities Created by Nonretroactive Statutory Amendments Cannot Constitute Extraordinary and Compelling Reasons for Compassionate Release, by Richard Resch
- The Constitution for Sale: FBI Confirms Resumption of Data Broker Dragnets, by Jo Ellen Nott
- NEWS IN BRIEF
More from David Kim:
- Ninth Circuit Holds Martinez May Excuse Nevada’s Timeliness and Successive-Petition Bars for Trial Ineffective Assistance Claims, Oct. 1, 2026
- Tenth Circuit Announces Valid Checks Alone Insufficient for § 1344(2) Bank Fraud, Holding Alleged Failure to Disclose Plausible Defense Warrants § 2255 Hearing, Oct. 1, 2026
- Eleventh Circuit Announces Concealed Firearm Possession Alone Insufficient for Reasonable Suspicion Under Florida’s Amended Concealed-Carry Law, Oct. 1, 2026
- Tenth Circuit Announces Resentencing After Probation Revocation Must Begin with Chapter 7 Range, Holding Chapter 5 Range Should Be Considered When Deciding Whether to Vary, Sept. 1, 2026
- Hawaii Supreme Court Announces False Evidence Standard Governs Post-Conviction Claims That Scientific Developments Invalidated Expert Testimony, Holding Prosecution Knowledge Not Required Under State Due Process Clause, Sept. 1, 2026
- Alaska Supreme Court Announces “Stop and Clarify” Rule Under Article I, Sections 9 and 11 of Alaska Constitution, Holding Officers Must Cease Questioning and Clarify Ambiguous Post-Waiver Request for Counsel, Sept. 1, 2026
- California Supreme Court Announces Article I, Section 28(f)(3) Does Not Authorize Denial of Bail Beyond Offenses Specified in Section 12, Holding Bail Must Generally Be Set in Amount Reasonably Attainable for Defendant, Sept. 1, 2026
- Connecticut Supreme Court Holds Trial Counsel Ineffective for Failing to Challenge Misleading CSLI GeoTime Video, Sept. 1, 2026
- Michigan Supreme Court Announces Two-Step Test for Mandatory LWOP Imposed for Pre-Aaron Felony Murder, Sept. 1, 2026
- Buried in Plain Sight: How Digital Discovery Turns Disclosure Itself Into Concealment, Aug. 15, 2026
More from these topics:
- South Dakota Supreme Court Affirms Prisoner’s Simple Assault on Guard Conviction Despite Four-Second Skip in Surveillance Video Footage, Oct. 1, 2026. Jury Instructions, Double jeopardy, Failure to Object, Evidence - Integrity/Reliability of, Denial of Due Process.
- New Jersey Court Rules That Denial of Transgender Prisoner’s Transfer Request Violates Neither Discrimination Law nor Equal Protection Clause, Sept. 1, 2026. Transfers, Civil Commitment, Discrimination (Transgender), Equal Protection Clause/Claims, Sexually Dangerous Persons/Sexual Violent Predators.
- Connecticut Supreme Court Holds Trial Counsel Ineffective for Failing to Challenge Misleading CSLI GeoTime Video, Sept. 1, 2026. Cell Site Location Information ("CSLI"), Failure to Consult/Investigate/Raise, Trial Strategy, Evidence - Integrity/Reliability of, Prejudice - Potential for Undue.
- Hawaii Supreme Court Announces False Evidence Standard Governs Post-Conviction Claims That Scientific Developments Invalidated Expert Testimony, Holding Prosecution Knowledge Not Required Under State Due Process Clause, Sept. 1, 2026. Forensic Sciences, Constitution, state, Evidence - Integrity/Reliability of, Expert and Opinion Testimony, Scientific Testimony or Evidence.
- Formally Available, Rarely Granted: A State Prisoner’s Guide to Federal Habeas Relief, Sept. 1, 2026. Administrative Exhaustion, Habeas Corpus, Bureau of Prisons Orders, Administrative Law/Remedies, Evidence - Integrity/Reliability of, Tolling of Statutes of Limitations and Laches, Federal Rules of Evidence, Statute of Limitations.
- Michigan Appeals Court: Witnesses Cannot be Forced to Wear Jail Clothes at Trial, Aug. 1, 2026. Interlocutory Appeals, Prejudice - Potential for Undue, Fair Trial, Witnesses - Examination of, Criminal Records.
- Louisiana Supreme Court Announces Framework Governing Factual Innocence Claims in First Application of La. C.Cr.P. Art. 926.2, Holding Second-Step Review Encompasses All Relevant Evidence, Aug. 1, 2026. Wrongful Conviction, Forensic Sciences, Actual Innocence/Claim of Innocence, Expert and Opinion Testimony, Scientific Testimony or Evidence.
- FBI Approves Rapid DNA Workflow for CODIS, Aug. 1, 2026. DNA Testing/Samples, Databases, Forensic Sciences, Evidence - Integrity/Reliability of, Scientific Testimony or Evidence.
- New Jersey Supreme Court Orders Plenary Hearing Before Special Adjudicator on Reliability of Fingerprint Evidence, Holding Century of Judicial Acceptance Did Not Satisfy Trial Court’s Gatekeeping Obligation Under N.J.R.E. 702, Aug. 1, 2026. Forensic Sciences, Evidence - Integrity/Reliability of, Daubert Standards, Fingerprint Evidence, Expert and Opinion Testimony.
- Ohio Jail Leaders Knew Cameras Were Broken for Four Years Before Fixing Them, July 1, 2026. Jail Misconduct, Security Systems, Disclosure of Records, Wrongful Death, Evidence - Integrity/Reliability of.





