There have been potentially 39 million cases in the last four years in which Americans have had their identities and Social Security Numbers stolen by illegal aliens, a new investigation reveals.

During an interview with SiriusXM Patriot’s Breitbart News Tonight, executive director of the Immigration Reform Law Insitute (IRLI) Dale Wilcox revealed to Breitbart News Senior Editor-at-Large Rebecca Mansour that their latest investigation revealed 39 million cases between 2012 and 2016 where names on W-2 tax forms did not match corresponding Social Security records.

If each fraudulent Social Security Number user submitted only one W-2 form a year under a fake identity, this still amounts to nearly ten million individuals using stolen identities of American citizens. There are more than 12 million illegal aliens currently living in the United States.

Wilcox said American children are the most vulnerable to illegal aliens stealing their identities and using their Social Security Numbers to work in the country.

“Studies have found that it affects children the most because see illegal aliens prefer to use children’s’ Social Security Numbers because your child … won’t apply for a loan for years, so the illegal aliens probably won’t be caught for decades possibly,” Wilcox said.

“A lot of Americans are being harmed by this. These poor kids, when they go to get their first school loan or car loan, they’ve got criminal histories … and bad credit,” Wilcox said. “This is not a victimless crime.”

As Breitbart News most recently reported, the illegal alien from Mexico accused of murdering 20-year-old college student Mollie Tibbetts allegedly stole an American citizens’ identity in order to appear to be working legally in the U.S. at an Iowa dairy farm.

Listen to Dale Wilcox’s full interview here:

Breitbart News Tonight broadcasts live on SiriusXM Patriot Channel 125 from 9:00 p.m. to Midnight Eastern (6:00-9:00 p.m. Pacific).

John Binder is a reporter for Breitbart News. Follow him on Twitter at @JxhnBinder.