ICE's use of "administrative subpoenas" and other executive tactics are in violation of the 4th Amendment of the Constitution. To operate legally, their request would need to be approved by a judge. That's not even a high bar, given the judiciary rubber-stamps the vast majority of warrants, but they can't even be bothered with that. The article points out that Google used to notify users of exactly this kind of request specifically so that the victim of the crime had time to challenge the subpoena in court, where it would be tossed out without giving away their private information, but now people are no longer being given a chance to defend themselves from abuse by Google's complicity.