Criminal Procedure

Future-Proofing the Fourth Amendment

June 25, 2018

In Carpenter v. United States, Chief Justice John Roberts began the process of future-proofing the Fourth Amendment. In a majority opinion marked by technological sophistication and powerful arguments about arbitrary government surveillance, but overshadowed by four separate dissenting opinions, Carpenter both reframes the Fourth Amendment and reveals its fractured soul. To understand Carpenter is to…

Redefining Strickland Prejudice after Weaver v. Massachusetts

May 22, 2018

Obtaining postconviction relief based on a defense attorney’s ineffective trial performance is notoriously difficult, but the U.S. Supreme Court may have just made it a little easier. In this post, we explain how the Supreme Court’s decision last term in Weaver v. Massachusetts offers a little-noticed but potentially powerful new way for criminal defendants to…


Double Jeopardy All Over Again?

April 30, 2018

What if Donald Trump pardons people identified as targets by Robert Mueller before, during, or after they are prosecuted in federal court? Would those people escape accountability for their acts, or would a state—particularly New York State, which has jurisdiction over Trump Tower and several key players—be able to prosecute them for what is defined…

Carpenter and the Property Vocabulary

December 8, 2017

Last week, the Supreme Court heard oral argument in Carpenter v. United States, which will decide whether the government may acquire — without a warrant, and without probable cause — records of a person’s movements, using cell-site location information. It was a lively argument, but I’m going to focus on Justice Gorsuch’s questions about what…

Carpenter and Our Third-Party Future

October 27, 2017

Later this year, the Supreme Court will hear argument in Carpenter v. United States. The question presented is whether the government may, without a warrant and without probable cause, obtain your location information from a third party that has it (like your cell-phone provider). In Carpenter, the government learned where a criminal suspect had gone…