CHICAGO (AP) – A trial in a massive, long-running counterfeit-documentation scheme centered in Chicago but that included a murder in Mexico City ended Tuesday with jurors finding three defendants should face mandatory life sentences.

The operation was based in Chicago’s Little Village neighborhood and flourished for at least 15 years until authorities broke it up in 2007. It generated about $3 million in annual sales of fake Social Security cards, driver’s licenses and other documents.

In a last stage of the six-week trial in U.S. District Court in Chicago, jurors determined Tuesday that Julio Leija-Sanchez, 37; his brother Manuel Leija-Sanchez, 45; and Gerardo Salazar-Rodriguez, 40, should get mandatory life for racketeering conspiracy because it involved murder.