AFTER FEDERAL AGENTS shot and killed Minneapolis nurse Alex Pretti on Saturday, Palantir workers pressed for answers from leadership on the company’s work with Immigration and Customs Enforcement (ICE)—and many questioned whether Palantir should be involved with the agency at all. Leadership defended its work as in part improving “ICE’s operational effectiveness.”

Internal Slack messages reviewed by WIRED reveal growing frustration within Palantir over its relationship with the Department of Homeland Security (DHS), and in particular, ICE’s enforcement and investigations teams. In response, Palantir’s privacy and civil liberties team published an update to the company’s internal wiki detailing its work on federal immigration enforcement, arguing that the “technology is making a difference in mitigating risks while enabling targeted outcomes.”

In a Saturday thread on Slack discussing Pretti’s killing, Palantir workers questioned both the ethics and the business logic of continuing the company’s work with ICE.

“Our involvement with ice has been internally swept under the rug under Trump2 too much. We need an understanding of our involvement here,” one person wrote.

“Can Palantir put any pressure on ICE at all?” wrote another. “I’ve read stories of folks rounded up who were seeking asylum with no order to leave the country, no criminal record, and consistently check in with authorities. Literally no reason to be rounded up. Surely we aren’t helping do that?”