# United States v. Conchas-Mancilla: Canine Alerts and Probable Cause

Page: https://stenobird.com/podcast/swear-on-the-stand-7111404/united-states-v-conchas-mancilla-canine-alerts-and-probable-cause
Text version: https://stenobird.com/podcast/swear-on-the-stand-7111404/united-states-v-conchas-mancilla-canine-alerts-and-probable-cause.md
Podcast: [Swear on the Stand](https://stenobird.com/podcast/swear-on-the-stand-7111404)
Published: 2026-04-20T14:00:00+00:00
Episode link: https://podcasters.spotify.com/pod/show/danielswear/episodes/United-States-v--Conchas-Mancilla-Canine-Alerts-and-Probable-Cause-e3i18tv
Audio file: https://anchor.fm/s/fddb5314/podcast/play/118579583/https%3A%2F%2Fd3ctxlq1ktw2nl.cloudfront.net%2Fstaging%2F2026-3-17%2F8c6d41bc-fbdc-d030-8e71-4ff491924213.m4a
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Duration seconds: 1598

## Resource

This episode details the Fifth Circuit Court of Appeals' decision to uphold a drug conviction against Jesus Arturo Conchas-Mancilla . The defendant challenged the search of his vehicle, arguing that a drug dog's instinctual alert was insufficient to establish probable cause compared to a formal, trained indication. However, the court ruled that the totality of the circumstances , including the dog's high level of reliability and certification , justified the search that uncovered hidden cocaine. By affirming the lower court's ruling, the judges clarified that canine behavior does not need to follow a rigid protocol to provide legal grounds for a vehicle inspection. This case reinforces that a credible alert from a drug-detection animal is a valid basis for a search under the Fourth Amendment .

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