A Colorado man has received a 130-month prison sentence for luring people to the United States and then forcing them to work in long-term care facilities, the U.S. Attorney for the District of Colorado announced.

Kizzy Kalu, 49, was convicted on dozens of criminal counts in July. He and a co-conspirator, 78-year-old Philip Langerman, were found guilty of promising nonexistent jobs to foreign nurses, then forcing them to take jobs in nursing homes once they were in the United States. The nurses paid Kalu about 40% of their earnings, and he threatened to have them deported if they did not comply.

In addition to his prison sentence, Kalu must pay more than $3.7 million in restitution, according to the U.S. Attorney’s office.

Langerman had pleaded guilty to his role, and Chief U.S. District Court Judge Marcia S. Krieger sentenced him to three years on probation.