BOSTON — Federal agents have finally hauled in a dangerous illegal predator who quietly lived in Boston for nearly two decades — including almost four years under Mayor Michelle Wu’s sanctuary city watch.

ICE Homeland Security Investigations agents say they arrested Eynar Estuardo Vielman Jimenez, 38, a Guatemalan national and registered sex offender, in West Roxbury on Aug. 2.

According to federal records, Jimenez slipped into the U.S. around December 2008 “through an unknown location and without inspection” — and managed to stay under the radar long enough to rack up a disturbing criminal record.

In April 2017, a Massachusetts court convicted Jimenez of three counts of indecent assault and battery on a person aged 14 or older. He was sentenced to 328 days in jail and ordered to register as a Level 2 sex offender.

Despite that conviction and his immigration status, Jimenez was allowed to remain in the city — a reality critics blame on Boston’s strict sanctuary rules, which under Wu bar police from cooperating with federal immigration authorities.

“Cases like this show exactly why sanctuary policies fail — they shield predators instead of protecting the public,” one Boston resident told Mass Daily News.

Jimenez now sits in ICE custody pending removal proceedings. Federal officials did not say why it took nearly 17 years to apprehend him, or why state and local authorities never turned him over after his 2017 conviction.

Residents say the arrest highlights a pattern: violent offenders only seem to face real consequences when federal agents — not Wu’s Boston — step in.

Members of the public can report crimes and suspicious activity by calling 866-DHS-2-ICE (866-347-2423).