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The Department of Homeland Security (DHS) recently lodged a U.S. Immigration and Customs Enforcement (ICE) detainer pleading with Texas authorities not to release an illegal immigrant accused of fatally slitting his wife’s throat with a pocketknife in Dallas.
Francisco Mendez-Marin, a 24-year-old illegal immigrant from Mexico, was arrested March 18 by the Carrolton Police Department and is charged with felony homicide after he allegedly killed his wife, 20-year-old Karla Rangel, during a domestic dispute.
The couple had been married for less than a month, FOX 4 Dallas reported.
When police arrived at the scene, Mendez-Marin had blood on his clothes and a bloody pocketknife on him, officials said.
Francisco Mendez-Marin is accused of brutally killing his wife in Dallas, Texas. (DHS)
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Body camera footage shows Mendez-Marin telling officers, "I didn't do anything bad" and "I was obligated to do it" in Spanish, according to the arrest affidavit.
"This depraved animal murdered his own wife just one month after they were married by brutally slitting her throat with a pocketknife," DHS Acting Assistant Secretary Lauren Bis wrote in a statement. "This illegal alien should have never been allowed into our country to commit this heinous murder."
An ICE agent monitors hundreds of asylum seekers being processed at the Jacob K. Javits Federal Building in New York City on June 6, 2023. (David Dee Delgado/Getty Images)
"ICE requested authorities in Dallas to not release this cold-blooded killer onto the streets," she continued. "Thankfully, Dallas politicians cooperate with ICE, so together we can ensure this murderer is NEVER loose in American communities."
Matthan Lough was arrested on an alleged child grooming charge in the Dallas suburb of Mesquite, Texas on Dec. 10, 2025. (iStock)
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Mendez-Marin is currently in Dallas County Sheriff’s Office custody and being held in the Dallas County Jail, according to DHS.
Alexandra Koch is a Fox News Digital journalist who covers breaking news, with a focus on high-impact events that shape national conversation.
She has covered major national crises, including the L.A. wildfires, Potomac and Hudson River aviation disasters, Boulder terror attack, and Texas Hill Country floods.
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