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Orin Kerr

@orinkerr

Professor, Stanford Law School. Senior Fellow, Hoover Institution. Author, The Digital 4th Amendment: https://www.amazon.com/Digital-Fourth-Amendment-Privacy-Policing/dp/0190627077/ref=tmm_hrd_swatch_0

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Latest posts by Orin Kerr @orinkerr

Hey, cool, Lowers is out. Will read.

10.03.2026 19:20 πŸ‘ 7 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Online account holders have 4A standing to challenge the search of messages in their own outbox, Minn SCT holds. Although the messages are sent, the copies stored in the user's outbox retain an REP. (Correct.)
mn.gov/law-library-...

10.03.2026 19:18 πŸ‘ 25 πŸ” 6 πŸ’¬ 1 πŸ“Œ 0
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An important limit on using AI to do legal history research: Here, my request was to have Claude (Opus 4.6 extended) find early cases on search & seizure, but it kept running into paywalls and other barriers that made it ultimately unable to do it in a useful way.

09.03.2026 18:35 πŸ‘ 28 πŸ” 8 πŸ’¬ 6 πŸ“Œ 0
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Just today came across this article from Jason Mazzone about 19th con law, and it puts a bunch of things together that I had wondered about. A very interesting read. Jason Mazzone, The Bill of Rights in the Early State Courts, 92 Minn. L. Rev. 1 (2007).
www.minnesotalawreview.org/wp-content/u...

09.03.2026 07:50 πŸ‘ 29 πŸ” 2 πŸ’¬ 2 πŸ“Œ 0
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β€œThe young man knows the rules, but the old man knows the exceptions.”

β€” Oliver Wendell Holmes Sr. (the Justice's father). The quote is from an 1871 commencement speech at a medical college. In the relevant passage, Holmes is pointing to the benefit of experience for physicians.

08.03.2026 21:54 πŸ‘ 53 πŸ” 8 πŸ’¬ 2 πŸ“Œ 0
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From William Blackstone, A Treatise On the Law of Descents in Fee Simple (1759), via the Yale Law Library.
www.flickr.com/photos/yalel...

08.03.2026 08:10 πŸ‘ 19 πŸ” 0 πŸ’¬ 1 πŸ“Œ 1

I think everyone recognizes that the law's rule-maker can consider results. But the question is always, who is the proper rule-maker? For an originalist, the proper rule-maker was those who enacted the constitution, not judges centuries later.

07.03.2026 00:32 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Totally unscientific, obviously, but perhaps still interesting: Among those law review authors who answered, 18% had AI write a lot of their articles; 27% had AI write a little bit of their articles; and 55% didn't have AI write anything.

07.03.2026 00:27 πŸ‘ 16 πŸ” 6 πŸ’¬ 1 πŸ“Œ 0
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A jury needs to figure out if the man the officer shot and killed who was firing his gun at New Years was (a) pointing his gun at the officer or (b) just shooting into the air. The former wouldn't be a 4A violation, but the latter would be. So no QI.
www.opn.ca6.uscourts.gov/opinions.pdf...

07.03.2026 00:22 πŸ‘ 22 πŸ” 3 πŸ’¬ 1 πŸ“Œ 0
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For a deep dive example, consider the arguments and opinion in the Aaron Burr case on the privilege against self-incrimination. Lots of policy arguments as to why the rule was or was not a particular way. harvardlawreview.org/print/vol-13...

07.03.2026 00:14 πŸ‘ 15 πŸ” 2 πŸ’¬ 3 πŸ“Œ 1
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This matches my read of historical legal arguments: In the 18th century, courts and commentators were very attuned to the consequences of legal rules, and considered them as justifications for/against rules.
review.law.stanford.edu/wp-content/u...

07.03.2026 00:11 πŸ‘ 24 πŸ” 7 πŸ’¬ 3 πŸ“Œ 2

Curious of what you make of Carpenter v. United States and Torres v. Madrid.

06.03.2026 23:37 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Employer can still complain/sue, but that's not likely.

06.03.2026 23:23 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Relatedly, what we tell kids that a word means may only be one part of what the word means.

06.03.2026 23:17 πŸ‘ 6 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

Only that which is in the screenshot.

06.03.2026 23:14 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I suppose the thinking is that you have the most 4A rights in your home, so whatever 4A rights you have elsewhere can also be infringed by the arrest warrant? Maybe, but that seems like a step that would have to be justified.

06.03.2026 23:06 πŸ‘ 9 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Not sure this is right. In the caselaw the court is relying on, the defendant has no 4A rights in the place that is searched. But as an employee, he did have 4A rights in the place searched; not sure why that would result in him still lacking standing to challenge the claimed Steagald violation.

06.03.2026 22:49 πŸ‘ 26 πŸ” 1 πŸ’¬ 2 πŸ“Œ 0
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Armed w/an arrest warrant for the defendant, officers enter his workplace w/o permission & arrest him. CA8: Assuming the defendant has 4A rights at work, he still lacks standing; they could enter his home to arrest him, so can enter his workplace, too.
ecf.ca8.uscourts.gov/opndir/26/03...

06.03.2026 22:49 πŸ‘ 19 πŸ” 4 πŸ’¬ 2 πŸ“Œ 0

Thus you see "Father of Candor" in 1765 talking about the seizure of all papers being "unreasonable" not in the sense that it violates the common law, but rather in the sense that it would be (as he puts it) extravagant, inquisitorial, leading to tyranny, etc.

06.03.2026 21:59 πŸ‘ 18 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

It's an interesting claim, and I agree that the Fourth Amendment would have been understood generally as drawing from the common law, but I don't see any historical evidence that anyone put those pieces together in that particular way in the 18th century.

06.03.2026 21:59 πŸ‘ 16 πŸ” 1 πŸ’¬ 2 πŸ“Œ 0

The claim is based on the idea that, in the 18th century, the common law was thought to be based on reason. If the common law was based on reason, the argument runs, then an unreasonable search and seizure would violate the common law.

06.03.2026 21:59 πŸ‘ 9 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0

BTW, there's an academic literature arguing that "unreasonable" searches and seizures meant searches and seizures not authorized by the common law, but I'm somewhat underwhelmed by the historical basis for that claim.

06.03.2026 21:59 πŸ‘ 9 πŸ” 1 πŸ’¬ 2 πŸ“Œ 1

Father of Candor also says that seizing all of the papers would be "unreasonable," which may be the earliest (or at least is one of the earliest) discussions in which a search or seizure is spoken of as reasonable or unreasonable.

06.03.2026 21:58 πŸ‘ 10 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0
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In an influential pamphlet on search and seizure published in London in 1765, "Father of Candor" opposes general warrants: Under such warrants, "every part of a man's most valuable possessions and privacy is liable to the ravage, inroad, and inspection of suspicious Ministers . . . "

06.03.2026 21:28 πŸ‘ 35 πŸ” 8 πŸ’¬ 2 πŸ“Œ 0

This is great stuff

And honestly just makes sense. The past is a foreign country. But it’s not Mars.

06.03.2026 17:12 πŸ‘ 55 πŸ” 15 πŸ’¬ 1 πŸ“Œ 0
Preview
Yale Law School And the Sixties: Revolt And Reverberations (Studies in Legal History) Yale Law School And the Sixties: Revolt And Reverberations (Studies in Legal History) [Kalman, Laura] on Amazon.com. *FREE* shipping on qualifying offers. Yale Law School And the Sixties: Revolt And Reverberations (Studies in Legal History)

Given all the things happening at Yale in this window, the entire run of Yale Advocate issues are a good read. See Laura Kalman's Yale Law and the 60s for more...
www.amazon.com/Yale-Law-Sch...

06.03.2026 05:54 πŸ‘ 5 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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"Rodell Says Passed over for 37 Years," your reminder that every legal academic has to complain about something, from a 1968 issue of the Yale Advocate.
collections.library.yale.edu/catalog/3249...

06.03.2026 05:43 πŸ‘ 17 πŸ” 0 πŸ’¬ 1 πŸ“Œ 1
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Arkansas SCT, 2002: We reject Whren under our state constitution, and hold that pretextual stops and arrests violate it.

Arkansas SCT, today: We were wrong in 2002, and we embrace Whren under the state const today. Pretexts aren't unconstitutional.
opinions.arcourts.gov/ark/supremec... #N

06.03.2026 02:32 πŸ‘ 25 πŸ” 14 πŸ’¬ 3 πŸ“Œ 2
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Founders Online: Nicholas Ridgely to James Madison, 22 March 1813 Nicholas Ridgely to James Madison, 22 March 1813

The opinion is by Nicholas Ridgely, who I believe was an ancestor of the more recent Delaware Supreme Court Justice Henry duPont Ridgely. (This is all very Delaware.) Here's an 1813 letter N. Ridgely wrote to James Madison.
founders.archives.gov/documents/Ma...

06.03.2026 01:20 πŸ‘ 5 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Simpson v. Smith, 2 Del. Cas. 285 (1817): When a person gets a valid warrant to search a place for their stolen goods, and they go with an officer and search the place but find nothing, the private party is liable for trespass (but the officer isn't). static.case.law/del-cas/2/ca...

06.03.2026 01:14 πŸ‘ 25 πŸ” 6 πŸ’¬ 1 πŸ“Œ 0