April 27, 2026

Michael's Daily Notes

The word of the day is "geofencing."


Today the Supreme Court must consider that thoroughly modern concept against words written in 1790 — the Fourth Amendment's guarantee that "[t]he right of the people to be secure in their persons, houses, papers, and effects" shall not be violated — as it takes up Chatrie v. United States. The outcome will set the boundaries for privacy in the digital age.


Here's what happened: After a $195,000 bank robbery in Virginia, a witness reported seeing the suspect carrying both a gun and a cell phone. When the case went cold, Chesterfield County police obtained a court-approved warrant directed at Google — not at any individual, but at Google's entire database of customer location data. The warrant asked Google to identify anyone within roughly a 1,000-foot radius of the bank at the time of the robbery. That perimeter also swept in a nearby church. Through a three-step process, Okello Chatrie was among those identified. He was arrested and convicted.


The core question for the justices: Does the Fourth Amendment permit the government to conduct what amounts to a digital dragnet — searching the location records of millions of innocent people — in order to identify a single suspect?


Think of a geofence as an invisible electronic perimeter drawn on a map. When law enforcement deploys one, they aren't targeting a known suspect. They're casting a wide net first and narrowing it down later. Chatrie's lawyers argue that's precisely the kind of "general warrant" the Founders condemned when drafting the Fourth Amendment's particularity requirement.


The government counters that cellphone users voluntarily share their location data with companies like Google and therefore surrender any reasonable expectation of privacy in it.


The last major word on this came in Carpenter v. United States (2018), where Chief Justice John Roberts wrote that the Fourth Amendment must not leave Americans' privacy "at the mercy of advancing technology" — and that government acquisition of cell phone location data constitutes a "search" requiring a warrant. But only three members of that majority remain on the Court. The newer justices — Kavanaugh, Barrett, and Jackson — are the wild cards.


Whatever the outcome, this ruling will shape how law enforcement uses not just cellphone data, but every digital record Americans generate simply by living modern life.

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DAILY POLL

Was Saturday’s assassination attempt a security success or security failure?

TOP STORY

President Donald Trump said he “wasn’t worried” during a shooting at the White House Correspondents' Dinner, describing how Secret Service agents evacuated him and the first lady as investigators probe a gunman who allegedly targeted administration officials.

TODAY'S YOUTUBE

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IN OTHER NEWS

Security lapses at the Washington Hilton—where guests reported minimal screening and a gunman easily checked in ahead of time—raised urgent questions about whether current Secret Service protocols are sufficient to protect President Trump in today’s heightened threat environment.

The U.S. Supreme Court is weighing whether controversial “geofence” warrants—used to identify suspects like bank robber Okello Chatrie through cellphone location data—violate the Fourth Amendment, setting up a major test of how privacy rights apply in the digital age.

King Charles III will proceed with his U.S. state visit as planned, with British and American officials tightening security coordination in the wake of the recent shooting at the White House Correspondents' Dinner.

A MESSAGE FROM COMCAST

Joe DePaolo, a first-time attendee of White House Correspondents’ Dinner weekend, describes shockingly lax and disorganized security at the Washington Hilton, where minimal checks made entry easy and confusion reigned—raising serious concerns about safety at a high-profile event attended by Donald Trump.

Iran has proposed reopening the Strait of Hormuz and ending the war in exchange for postponing nuclear talks, offering a potential breakthrough in stalled diplomacy while raising concerns about losing U.S. leverage over Tehran’s nuclear program.

A report finds Iran’s strikes inflicted up to $5 billion in damage to U.S. military bases and assets across the Gulf, raising concerns about the Trump administration’s lack of transparency on the full cost of repairs.

MORE NEWS

Compass CEO Robert Reffkin’s push for “coming soon” home listings is reshaping the housing market by giving sellers more control over pricing and visibility, while raising concerns that reduced transparency could disadvantage buyers and fragment access to critical market information.

A new U.K. law banning tobacco sales to anyone born after 2008 aims to create a smoke-free generation, but critics warn it could fuel black markets, undermine civil liberties, and repeat the unintended consequences seen in past prohibition efforts.

A sweeping early evaluation of the NFL’s 2026 draft classes ranks all 32 teams, with the New York Jets earning top honors and an A+ for a haul projected to accelerate their rebuild.

For the Left

Israeli leaders, including Prime Minister Benjamin Netanyahu and President Isaac Herzog, condemned the attempted assassination of President Trump, praising U.S. Secret Service actions and joining global leaders in expressing solidarity and concern over threats to democratic stability.

For the Right

A 14-year-old suspect has surrendered to police after a fatal shooting at a Hamilton mall that left a 16-year-old dead, with investigators saying the incident stemmed from an altercation between the teens, all involved parties have been identified, and no additional suspects are being sought.

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