Immigration and Customs Enforcement (ICE) announced on Monday that it had reached a non-prosecution agreement with a North Texas building company over a scheme in which the company unlawfully employed illegal aliens.

According to an ICE statement, Speed Fab Crete terminated illegal immigrant employees only to rehire many of them through a temporary staffing company. Earlier this month, company co-owners Ronald Alan Hamm and David Leon Bloxom and company CFO Robert Edwin James pleaded guilty to misdemeanor unlawful employment of illegal aliens. A third co-owner of the company, Carl Eugene Hall, pleaded guilty to felony conspiracy to unlawfully harbor illegal aliens.

Mark Sevier, the owner of the temp agency, also pleaded guilty to the same offense as Hall.

Hall, Bloxom, and Hamm will be personally held liable for the $3 million if their company fails to pay the penalty. The money will go to the U.S. Treasury "for use in promoting law enforcement activities related to immigration enforcement," according to ICE.

The company also agreed to use E-verify, not to violate immigration laws, and to discipline those who tried hiring illegal workers. It had hired at least 43 illegal workers, according to an inspection of its employment records.

TRUMP IMMIGRATION POLICIES SHOWING RESULTS, WITH ILLEGAL BORDER CROSSINGS PLUMMETING

Ryan Spradlin, a special agent with Homeland Security Investigations in Dallas, said the agreement helped protect the integrity of the U.S. immigration system.

"It’s criminal investigations like these, that not only exemplify HSI’s mission to protect the integrity of the U.S. immigration system, but also serve as a warning to business owners willing to hire an illegitimate workforce. You can not only expect a hefty fine but a prison sentence as well," he said.

Hall and Sevier face up to five years in federal prison, while Hamm, Bloxom and James face up to six months in prison.

In 2018, ICE announced it had engaged in a similar operation, arresting 133 people on immigration violations after raiding businesses in Nebraska and Minnesota.

CLICK HERE TO GET THE FOX NEWS APP

ICE conducted 267,258 removals in fiscal year 2019 -- up from 256,058 in fiscal year 2018. According to its annual report, 91 percent of the removed individuals had criminal convictions or were facing pending criminal charges at the time of arrest. The number of arrests, however, fell to 143,000 in fiscal year 2019 from 159,000 in fiscal year 2018.

In fiscal year 2019, individuals were charged for a variety of violent crimes that included homicide (1,900), kidnapping (1,800), sex offenses (12,000) and assault (45,000). The vast majority of arrests -- 86 percent -- involved pending criminal charges or criminal convictions, according to the report.