After Medicaid officials improperly shared data about millions of people in January with immigration officials, ICE then shared that data with the data analytics firm Palantir, according to new court filings. Palantir operates an app called ELITE that is used by ICE agents to show the addresses of noncitizens who may be subject to deportation.

That revelation was made public in a motion filed Thursday by more than 20 Democratic attorneys general who sued the Trump administration last year over its data-sharing agreement between the Centers for Medicare and Medicaid Services and ICE.

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U.S. District Judge Vince Chhabria in California ruled in December that health officials could share with ICE certain details from Medicaid data about immigrants without lawful status from the states that had sued, such as home addresses, dates of birth and immigration status.

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ICE was supposed to delete the improperly shared data. Chhabria set a hearing for August to further clarify his order and clear up ambiguity regarding which categories of noncitizens’ data could be lawfully shared with ICE.

But in recent days, federal officials have admitted to additional instances of improper data sharing.

In a court filing last week, the Justice Department said that CMS again inadvertently reshared with ICE the dataset with millions of names that CMS had first improperly shared with ICE in January. The government said the error occurred during an effort to share data from states not involved in the lawsuit.

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Meanwhile, the Department of Justice is asking the judge to expand his order to allow ICE to receive data on a broader category of noncitizens – to potentially include all immigrants who are not legal permanent residents, citizens or have another form of permanent status.

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According to a declaration filed by California deputy attorney general Anna Rich, when plaintiffs asked what federal officials did to ensure Palantir and other contractors had purged the data, defendants responded that the data had been shared over a Microsoft Teams chat and the shared data was deleted from the chat. Rich shared in her declaration a document turned over in discovery from federal officials that shows a redacted transcript of what appears to be ICE personnel asking Palantir to delete the file.

In an April 30 hearing, Chhabria had warned the federal government would not be able to continue using Medicaid data for deportation efforts if it continued improperly sharing the data of citizens and legal immigrants.