A New Jersey man, believed to be living illegally in the United States, has been charged in the fatal shooting of two former roommates and a woman in southwest Missouri.

Luis Perez was charged Tuesday with three counts of first-degree murder in the killings of 38-year-old Steven Marler, 23-year-old Aaron Hampton and 21-year-old Sabrina Starr in Springfield, Missouri. Perez faces eight other felony counts in the early November shootings.

Police say federal authorities believe the 23-year-old Perez is in the country illegally. No specifics have been released about his immigration status or nationality.

Officials also say that Perez is wanted for active warrants out of New Jersey.

Police have also charged Perez’s girlfriend, Dalia Garcia. Officials say that she came to Missouri from New Jersey last week and helped to burn evidence. She was charged with tampering with evidence.

Aaron Anderson, 19, who told police he was waiting outside when the men were killed, is charged with two counts of first-degree murder.