Alexander Zwinck is listed in the leaked data as a special agent in the Grand Junction field office of Homeland Security Investigations, a subagency of U.S. Immigration and Customs Enforcement. The disclosure, first reported Thursday, sheds new light on the revolving door between local law enforcement and federal immigration authorities in western Colorado.

Zwinck's departure from the Mesa County Sheriff's Office followed his decision to warn federal agents about an impending operation, though the exact circumstances and timing of that tip remain unclear. His subsequent hiring by HSI raises concerns about whether local officers who cooperate with federal immigration enforcement face any meaningful consequences, or whether such cooperation is quietly rewarded.

The leaked data was posted by an activist group that tracks the movements and identities of immigration enforcement personnel. It remains unclear how the group obtained the information or whether Zwinck's role was confirmed independently.

For residents of Mesa County and the Grand Junction area, the case underscores the blurred lines between local policing and federal immigration enforcement. Community advocates have long argued that when local deputies act as de facto immigration agents, it erodes trust in law enforcement and makes communities less safe. The fact that Zwinck moved directly into a federal immigration role after leaving the sheriff's office may reinforce those concerns.

The Mesa County Sheriff's Office did not immediately respond to questions about Zwinck's tenure or the circumstances of his resignation. HSI likewise did not comment on his employment status.

The disclosure comes amid heightened scrutiny of ICE operations in Colorado. In recent weeks, federal judges have ordered the release of detainees from the Aurora detention center, only to have ICE agents waiting outside to re-arrest them—a practice that drew outcry from attorneys and jurists before officials ended it. The Zwinck case adds another layer to the debate over how immigration enforcement is carried out and who is accountable when local officials cross the line into federal work.

For now, the leaked data offers a rare glimpse into the career path of an officer whose actions blurred the boundary between local law enforcement and federal immigration policy—and who ultimately joined the agency he once tipped off.