A 52-year-old Mexican national, Gilberto Martinez Geronimo, was arrested in Upper Darby on May 19, 2026 and taken into federal custody on allegations of unlawful reentry and failing to register as a sex offender. Prosecutors say Martinez had been living in the township after returning to the United States years after his deportation. The case remains an allegation unless and until a court decides otherwise.
Arrest and past conviction
According to Delco Times, Martinez was convicted in New Jersey in February 2001 of aggravated sexual assault and related offenses and was sentenced to 10 years in prison. The outlet reports that he was released into the custody of federal immigration officials in January 2007 and deported to Mexico, and that investigators allege he illegally reentered the United States around May 2021. Federal charging documents cited by the paper say he faces counts of failure to register as a sex offender and unlawful reentry, and prosecutors say he remains in federal custody while the case proceeds.
Charges and potential penalties
Illegal reentry after deportation is charged under 8 U.S.C. § 1326, which can carry enhanced penalties, including sentences up to 20 years when the prior removal followed an aggravated felony, and failure to register under the federal sex offender statute can carry up to 10 years. See Law.Cornell.edu and Law.Cornell.edu for the statutory language and maximum penalties. Those are the potential maximums prosecutors cited, and any sentence would be determined by a judge and federal sentencing guidelines if there is a conviction.
FBI action near a school
Federal agents executed a warrant May 21 in the 200 block of Wembley Road, a short walk from Bywood Elementary School, during a pre-dawn FBI raid, Hoodline reported, citing local coverage by Delco Times. Officials told reporters the warrant service did not disrupt voting or school operations that day. Neighbors and parents told reporters the visible federal presence was alarming given the proximity to a school, although authorities sought to reassure the public there was no ongoing threat.
Local politics and community response
The arrests and visible federal enforcement arrive amid a broader local debate. Upper Darby’s council voted in February to limit municipal participation in civil immigration enforcement, an effort council members said was meant to protect immigrant families while still allowing police to comply with criminal warrants. The Philadelphia Inquirer has covered the vote and the township’s effort to balance public safety concerns with immigrant community fears. As Council member Kyle McIntyre put it, “anybody that commits a crime in Upper Darby Township will be held accountable.”
What’s next
Federal prosecutors in the Eastern District of Pennsylvania will determine next steps, and Martinez is scheduled to remain in federal custody as the case moves forward, according to Delco Times. As with any federal indictment, the charges are allegations and the defendant is presumed innocent unless and until proven guilty in court.
