"Criminal illegal alien" is not a single legal term but a descriptive phrase used by DHS/ICE to mean a noncitizen (an "alien" under federal law) who is both removable or present without lawful status and has been convicted of, or is accused of, criminal conduct. "Illegal" refers to immigration status (e.g., unlawfully present or removable); "criminal" refers to criminal convictions or arrests. The INA treats immigration status and criminal convictions separately but makes certain convictions grounds for removal.
ICE derives authority from the Immigration and Nationality Act and DHS delegations (e.g., 8 U.S.C. §1103). Statutory provisions allow ICE to arrest, detain, and place noncitizens into removal proceedings (see 8 U.S.C. §§1226, 1227, 1231). ICE’s Criminal Alien Program and Institutional Hearing and Removal Program identify incarcerated convicted noncitizens, place detainers, take custody after sentences, and initiate removal in immigration court (EOIR).
WOW.DHS.gov ("Worst of the Worst") is a DHS public website that aggregates and publishes information on noncitizens DHS identifies as convicted or alleged criminals who were arrested by DHS/ICE; it includes searchable case summaries and press releases about those arrests and enforcement actions.
"Sanctuary politicians" refers broadly to elected officials or local jurisdictions that limit cooperation with federal immigration enforcement. "Sanctuary" policies vary but commonly include refusing to honor ICE civil immigration detainers, declining to share immigration status with ICE, or prohibiting local enforcement of federal immigration law. Definitions and practices differ by city/state and by local ordinances or policies.
The DHS press release does not provide custody, court or removal status for the five named individuals; that information is not included in the release and was not publicly provided there.
To verify arrests or find official case documents, members of the public can: 1) search federal and state court records (PACER for federal courts; state court online portals for state cases); 2) search EOIR/immigration court records (via EOIR or case lookup tools such as EOIRs automated systems or FOIA requests to ICE/DHS); and 3) check local law enforcement or county jail inmate rosters and press releases and DHS/ICE press pages (including WOW.DHS.gov).