Skip to main content

Can police compel a building full of people to apply their fingerprints to unlock phones?

master prints unlock phones touchid01
123RF
Touch ID might have paved the way for iPhone features like Apple Pay, but the fingerprint sensor is also at the center of a recent opinion by a federal judge that denied a search warrant request, reports Motherboard.

The opinion, handed down by U.S. Magistrate Judge M. David Weisman, has some of its roots in a search warrant uncovered by Forbes back in May 2016. The warrant, executed by federal officials, compelled folks in a Lancaster, California building to apply their fingerprints in order to unlock phones the police believed contained evidence of a crime. The news outlet has since uncovered similar warrants, all of which allowed similar access to devices.

Fast forward to 2017, when the government submitted a similar warrant application to an Illinois federal court as part of a child pornography investigation. According to the court, the application did not do enough to establish probable cause sufficient to permit the government to compel anyone at the location to give up their fingerprints to unlock a collection of phones suspected of containing evidence of crime. As such, the application ran afoul of the Fourth Amendment.

“This Court agrees that the context in which fingerprints are taken, and not the fingerprints themselves, can raise concerns under the Fourth Amendment,” reads Weisman’s opinion. “In the instant case, the government is seeking the authority to seize any individual at the subject premises and force the application of their fingerprints as directed by government agents. Based on the facts presented in the application, the Court does not believe such Fourth Amendment intrusions are justified based on the facts articulated.”

Weisman also opined that the warrant application potentially clashed with the Fifth Amendment protection against self-incrimination as well. As The Washington Post notes, someone indirectly admits that a phone belongs to them in the event that they respond to an order by picking a finger that was selected to unlock a phone.

“Essentially, the government seeks an order from this Court that would allow agents executing this warrant to force ‘persons at the Subject Premises’ to apply their thumbprints and fingerprints to any Apple electronic device recovered at the premises,” reads Weisman’s opinion.

On a more granular level, the application makes no specific mention of which devices at the premises would be searched, with only the vaguest mention that “it is likely” Apple devices will be found.

The decision has the interesting effect of pairing fingerprints with digital evidence when it comes to warrants, though it also implies that such warrants can be granted if issues with the Fourth and Fifth Amendments are somehow rectified.

Editors' Recommendations

Williams Pelegrin
Former Digital Trends Contributor
Williams is an avid New York Yankees fan, speaks Spanish, resides in Colorado, and has an affinity for Frosted Flakes. Send…
Is the Google Pixel 8a waterproof?
A render of the Google Pixel 8a with its scree turned on. It's against a light blue background.

Google's Pixel A series is an oddball compared to other midrange phones. Besides some mediocre features that fit the price, the A series phones surprisingly share some other attributes with their more premium siblings.

The all-new Google Pixel 8a is alike in this regard and shares such things as the Tensor G3 chip, wireless charging, and seven years of software support from Google. It's also the first A-series Pixel to get a 120Hz display. But if you're wondering whether or not the Pixel 8a is waterproof, here's what you need to know.
Is the Google Pixel 8a waterproof?

Read more
How to use Apple Music Sing
Apple Music Sing on an iPhone.

If you're someone who likes to sing along to your music a lot, then you might be interested to know that Apple Music has had a feature called Apple Music Sing that basically turns your iOS device or Apple TV into a karaoke machine.

Arriving late in 2022, the little-known feature enhances the lyrics feature of the Apple Music app that lets you read along with the words of your tunes. There's also a new volume control slider that lets you fade the vocal track out, so you can sing it yourself. Available only for Apple Music subscribers, it's a feature that's sure to be a holiday sing-along hit.

Read more
Does the Google Pixel 8a have a headphone jack?
A render of the Google Pixel 8a in its porcelain color, showing the front and back of the phone.

The Google Pixel 8a is the latest and greatest in Google’s midrange A-series smartphone lineup. It costs an affordable $499, but boasts many features that make Pixel phones so popular, including great camera hardware, a Tensor G3 chip, and a 120Hz refresh rate on its 6.1-inch OLED display. All of this makes it a great option for most people who aren’t looking for cutting-edge specs.

However, you might be wondering if it comes with a headphone jack so you can use it with wired earbuds. Smartphone manufacturers have increasingly eliminated this feature in favor of pushing customers to their own line of Bluetooth earbuds and headphones. Does this also apply to the Pixel 8a? Here’s the deal.
Does the Pixel 8a have a headphone jack?

Read more