This legislation, known as the "No Secret Police Act of 2025," amends the Homeland Security Act of 2002 to enhance transparency and accountability for Department of Homeland Security (DHS) law enforcement officers. Specifically, it mandates that officers and agents involved in border security or immigration enforcement must visibly display their official insignia or uniform and provide identification of their employing component when detaining or arresting an individual. A crucial provision also prohibits these officers from wearing any face covering that conceals their identity during such encounters. The bill clarifies that its provisions do not limit the use of tactical gear, but it requires the Secretary of Homeland Security to submit initial and updated reports on the Department's policies regarding tactical gear. Furthermore, it directs DHS to conduct research and development into technology aimed at maximizing the visibility of official insignia or uniforms during detentions or arrests, considering various environmental factors. These requirements apply to all DHS law enforcement officers and agents, including those from U.S. Immigration and Customs Enforcement (ICE).