A search warrant executed earlier this year gave authorities the power to force occupants of a Los Angeles-area house to unlock devices with their fingerprints. The warrant is significant, as there have only been a few cases that have tackled whether it is legal for the government to collect fingerprints as part of a search warrant. The outcome of why the government wanted access to the house and its fingerprints is unclear, but that the warrant was served shows some federal judges are receptive to this way of unlocking devices, which may serve as a warning that fingerprints should not be relied upon as a foolproof security method.”]
Source: https://www.cuinfosecurity.com/blogs/police-collect-fingerprints-to-unlock-phone-p-2285