Analysis and Commentary on Criminal Procedure
“Implied Consent” and the Fourth Amendment Go To the US Supreme Court

Cornell law professor Sherry F. Colb comments on a case the US Supreme Court recently agreed to review raising the question whether a state statute may constitutionally conduct a blood test on an unconscious driver suspected of drunk driving under a theory of “implied consent.” Colb explains the meaning of “implied consent”—deceivingly named, for there is no actual consent—and predicts that, consistent with the Court’s recent precedent on a similar issue, the state statute should be struck down.

Who’s a Good Boy? US Supreme Court Considers Again Whether Dog Sniffs Are Searches

Cornell law professor Sherry F. Colb comments on a case in which the US Supreme Court is considering whether to grant review that presents the question whether police must obtain a search warrant before bringing a trained narcotics dog to sniff at a person’s door for illicit drugs. Colb highlights some of the most interesting arguments on the issue and explains some of the nuances that make a clear answer more elusive in these cases.

2018 Year in Review: Child Sex Abuse Statutes of Limitations, and the Catholic Bishops’ Spiritual Retreat

Marci A. Hamilton—the Robert A. Fox Leadership Program Professor of Practice, and Fox Family Pavilion Resident Senior Fellow in the Program for Research on Religion at the University of Pennsylvania—comments on the progress (and lack thereof) of legislation in 2018 affecting child sex abuse victims’ access to justice across the United States. In particular, Hamilton calls upon American bishops to start advocating for, rather than against, the victims of abuse.

Collins v. Virginia: An Innocuous, Fourth Amendment Decision About Curtilage

Cornell law professor Sherry F. Colb comments on the US Supreme Court’s precedents recognizing, yet not clearly defining, “curtilage”—the area near one’s house that is constitutionally protected against warrantless searches by law enforcement. As Colb explains, the Court’s cases involving curtilage, including its recent decision in Collins v. Virginia leave many Fourth Amendment questions unanswered.

Carpenter and the Beginning of the End of Privacy

Cornell law professor Sherry F. Colb comments on the US Supreme Court’s recent decision in Carpenter v. United States, in which the Court held that the government must have a search warrant to obtain an individual’s cell-site location information (CSLI). Colb describes the Court’s holding and the dissenting opinions, and considers the Court’s minority (but growing) view that only property, and not privacy, is protected under the US Constitution—particularly when privacy rights encompass the right of a woman to obtain an abortion and the right of same-sex couples to engage in private, consensual sexual acts.

Rental Cars, Privacy, and Suppression of Evidence

Cornell law professor Sherry F. Colb comments on the recent decision by the US Supreme Court in Byrd v. United States, in which the Court unanimously held that a lawful but contractually unauthorized driver of a rental car has a reasonable expectation of privacy against police searches of the car. Colb explains that the Court’s ruling is significant for more than its face value; it signals a rejection of property-linked formalism and bolsters the ability of the Fourth Amendment to keep certain types of police in check.

Do Defendants Have the Right to Make Bad Decisions?

Cornell University law professor Sherry F. Colb comments on the case before the US Supreme Court, McCoy v. Louisiana, in which the Court will decide whether a criminal defendant has a Sixth Amendment right to stop his attorney from announcing to a jury that his client killed the victims for whose murder he is standing trial. Colb considers the argument that the lawyer's behavior constituted deficient performance counsel and argues that in that case, the defendant's conviction should be reversed and remanded for a new trial.

What Miranda Can Teach Us About Sexual Consent

Cornell University law professor Sherry F. Colb compares the requirement that police officers advise suspects in custody of their Miranda rights with the proposal that we as a society adopt a "Yes means yes" requirement for sexual consent. Colb describes how many of the fears about Miranda never actually came to fruition and points out how both the strengths and weaknesses of Miranda can help us to figure out how best to design the rules defining sexual assault.

Does the Automobile Exception to the Warrant Requirement Extend to Private Driveways?

Cornell University law professor Sherry F. Colb considers a question raised, but most likely not to be decided, in a criminal procedure case currently before the US Supreme Court. That case, Collins v. Virginia addresses the automobile exception to the Fourth Amendment warrant requirement, and Colb explores some reasons for eliminating the automobile exception altogether.

Why Justice Gorsuch May Have Avoided the Word “Privacy” at the Carpenter Oral Argument

Cornell University law professor Sherry F. Colb comments on the recent oral argument in Carpenter v. United States, in which the US Supreme Court will consider whether the Fourth Amendment requires the government to obtain a warrant before demanding that a cell phone service provider reveal location data about a target’s phone for a certain period of time. Colb notes that during oral argument, the Court’s newest justice, Justice Neil Gorsuch, conspicuously avoided using the word “privacy”—a choice that Colb suggests reflects his views on substantive due process and the rights that flow from that constitutional principle, such as abortion and physician assistance in dying.

The US Supreme Court Considers the Scope of the Automobile Exception

Cornell University law professor Sherry F. Colb comments on a case the US Supreme Court recently agreed to hear regarding the scope of the automobile exception to the Fourth Amendment warrant requirement. Colb explains the facts leading up to the controversy, the arguments on both sides, and the unusual nature of the case. Colb points out that the Court was likely motivated to hear the case to resolve a question the case does not even squarely present, namely whether the presence of a car in a driveway is a reason not to apply the automobile exception.

Supreme Court Considers Whether to Grant Privacy to Cell Tower Location Records

Cornell University law professor Sherry F. Colb considers the reasoning behind an appeals court's allowing law enforcement to acquire, without a warrant or probable cause, cell phone records that include a user’s approximate location over a period of several months. Colb expresses relief that the U.S. Supreme Court has decided to consider the issue so that we can know whether, by using a cell phone, we are thereby exposing our location to the police (and not just to our wireless service providers).

A Fresh Look at Jury Nullification

In response to a recent episode of the podcast Radiolab that relates the story of a juror who was prosecuted for attempting jury nullification, Cornell University law professor Sherry F. Colb considers how we ought to think about the power of jurors to acquit for any reason. Colb explains what jury nullification is and describes some situations in which it is most clearly appropriate and some in which it is problematic. She also proposes a solution to address bias in all phases of the criminal process, rather than just prosecution and trial.

The Supreme Court Rejects Fake Facts in Capital Cases

Cornell University law professor Sherry F. Colb considers one recent instance in which the U.S. Supreme Court endorsed a standard because it was factually more accurate than a prior standard, and several other instances in which the Court has done the opposite. Colb points out that, unfortunately, the law often seeks facts that facilitate a desired outcome rather than facts a more just or correct outcome.

Does the Juror Deliberation “Privilege” Work? Questioning the Supreme Court’s Assumptions

Cornell University law professor Sherry F. Colb comments on a recent decision in which the U.S. Supreme Court held that a juror’s use of racial stereotypes to vote for conviction may be used to invalidate the verdict, despite evidentiary rules that otherwise prohibit the use of juror testimony to challenge a verdict. Colb argues that the Supreme Court should have either extended the Sixth Amendment exception to cover other types of juror misconduct, or repealed the rule that prohibits the use of post-verdict juror testimony to impeach a verdict.

How Race Changes Things: The Supreme Court’s Decision in Buck v. Davis

Cornell University law professor Sherry F. Colb examines the how ineffective assistance of counsel and equal protection interact in cases involving race to produce results different from what might result from similar cases not involving race. Specifically, Colb looks at whether the U.S. Supreme Court’s conclusion of ineffective assistance of counsel in Buck v. Davis would have been different if the issue of race had not been involved.

Is President Trump Really Filling the Scalia Seat?

John W. Dean, former counsel to President Nixon, converses with author David Dorsen about whether President Trump’s pick for the U.S. Supreme Court, Judge Neil Gorsuch, is going to be ideologically consistent with the late Justice Antonin Scalia, whose seat Gorsuch would fill. Led by Dean’s questions, Dorsen explains that Scalia was not as across-the-board conservative as many thought him to be, and Gorsuch may not be either, at least not on topics such as trial by jury and double jeopardy.

Supreme Court to Consider When a Criminal Defendant Must Pay With His Life for His Lawyer’s Error

Cornell University law professor Michael C. Dorf comments on a case before the U.S. Supreme Court that presents the issue whether and when a criminal defendant should pay with his life for an error made by his lawyer. Dorf explains the facts behind the case as well as the relevant legal precedents. He argues that Davila, the criminal defendant in this case, might convincingly argue that his first real opportunity to complain about the ineffectiveness of counsel on direct appeal is in a state habeas proceeding.

Meet our Columnists
Vikram David Amar
Vikram David Amar

Vikram David Amar is a Distinguished Professor of Law at UC Davis School of Law and a Professor... more

Neil H. Buchanan
Neil H. Buchanan

Neil H. Buchanan, an economist and legal scholar, is a visiting professor at the University of... more

John Dean
John Dean

John Dean served as Counsel to the President of the United States from July 1970 to April 1973.... more

Michael C. Dorf
Michael C. Dorf

Michael C. Dorf is the Robert S. Stevens Professor of Law at Cornell University Law School. He... more

Samuel Estreicher
Samuel Estreicher

Samuel Estreicher is Dwight D. Opperman Professor of Law and Director of the Center of Labor and... more

Leslie C. Griffin
Leslie C. Griffin

Dr. Leslie C. Griffin is the William S. Boyd Professor of Law at the University of Nevada, Las... more

Joanna L. Grossman
Joanna L. Grossman

Joanna L. Grossman is the Ellen K. Solender Endowed Chair in Women and Law at SMU Dedman School... more

Marci A. Hamilton
Marci A. Hamilton

Professor Marci A. Hamilton is a Professor of Practice in Political Science at the University of... more

Joseph Margulies
Joseph Margulies

Mr. Margulies is a Professor of Government at Cornell University. He was Counsel of Record in... more

Austin Sarat
Austin Sarat

Austin Sarat is the William Nelson Cromwell Professor of Jurisprudence and Political Science at... more

Laurence H. Tribe
Laurence H. Tribe

Laurence H. Tribe is the Carl M. Loeb University Professor Emeritus at Harvard University and... more

Lesley Wexler
Lesley Wexler

Lesley Wexler is a Professor of Law at the University of Illinois College of Law. Immediately... more