DHS/ICE do not have a single statutory definition labeled “criminal illegal alien.” In ICE materials the term is used informally to mean non‑U.S. nationals (aliens) who are removable and who have been charged with or convicted of crimes in the United States or who are identified by ICE’s Criminal Alien Program (CAP) as incarcerated or at‑large criminal aliens posing a public‑safety risk.
ICE’s 70% claim is an agency statistic based on ERO enforcement case data; ICE/ERO publish arrest and conviction counts on their ERO statistics dashboards and in press releases, but the DHS release does not specify the exact numerator, denominator or date range. To verify the calculation you must consult ICE’s ERO Statistics dashboards (arrests by criminality) or request supporting data from ICE/DHS.
WOW.DHS.gov ("Worst of the Worst") is a DHS webpage that publishes public-facing summaries and photos of noncitizens ICE has arrested and describes as ‘criminal illegal aliens,’ along with links to ICE press releases and the agency’s public listings of arrests and removals; it is not a court‑record repository.
Tricia McLaughlin is Assistant Secretary for Public Affairs at DHS (the press office lead). In that role she issues public statements for DHS and ICE enforcement actions but does not prosecute cases; operational arrest and prosecutorial authority resides with ICE/ERO, HSI, U.S. Attorneys and federal/state prosecutors.
After an ICE arrest, criminal prosecutions (for federal/state crimes) follow ordinary criminal‑justice processes (local/state police, prosecutors, grand juries, trials, sentencing). Separately, ICE initiates civil immigration removal proceedings (administrative hearings before an immigration judge) or executes removal orders; some cases involve both criminal convictions (prosecuted by U.S. Attorneys or state prosecutors) and later ICE administrative removal actions.
Members of the public can verify convictions and court records by searching: (1) state court dockets (state court websites or PACER for federal cases), (2) the PACER federal docket system for U.S. District Court records, (3) official U.S. Attorney or state prosecutor press releases, and (4) ICE/DHS press releases and the ERO Statistics dashboard; when records are not online, FOIA requests or clerk‑of‑court requests retrieve certified records.