ICE press release, emphasis added by VDARE.com:

A 23 year-old Mexican national who is illegally present in the United States is facing murder charges in Missouri. He was released from the custody of the Middlesex County Jail earlier this year after a U.S. Immigration and Customs Enforcement’s (ICE) Enforcement and Removal Operations (ERO) detainer was declined.

Luis Rodrigo Perez was being held at Middlesex County Jail in December of last year on domestic violence charges. ICE issued a detainer and requested notification prior to his release, so that he may be taken into ICE custody and placed in removal proceedings. In accordance with their local policy, Middlesex County Jail did not honor the detainer, did not notify ICE upon completion of the criminal proceedings, and released Perez into the community.

“This tragedy might have been avoided had it not been for the reckless policy required of the Middlesex County Jail by their county officials,” said John Tsoukaris, Field Office Director of ERO Newark. “Despite such policies, ICE ERO will continue to enforce federal immigration law and prioritize public safety in the community.”

After his release from the jail in February of 2018, Perez eventually made his way to Missouri. He has now been charged in a triple murder that recently occurred in Springfield, Missouri.

Tsoukaris further explained, “We have tried unsuccessfully to work with Middlesex County Jail in the interest of public safety to accept detainers and to contact ICE prior to releasing criminals. There have been other cases where ICE detainers were not honored and those released went on to commit serious crimes. In this most recent case, Perez had a violent history, but despite that, the detainer was not honored. We hope that this tragic turn of events forces Middlesex to reconsider its policy and that the local elected officials stop protecting criminal aliens.”