BOSTON— Federal authorities arrested 11 illegal immigrants in Massachusetts they say are tied to a massive taxpayer-funded benefit fraud scheme that exceeded $1 million. The Justice Department announced charges against a total of 15 alleged fraudsters, which includes the 11 illegal aliens, during a press conference on Thursday in Boston. Several of the accused fraudsters are “John Does” who used stolen identities and their names remain unknown. Colin M. McDonald, assistant attorney general for the Justice Department’s fraud division, said federal investigators are “still working” to determine the “true identities” of the unnamed fraudsters. “We don’t know who they are fully, but we do know who they are not. They are not the American citizens they pretend to be, and from that initial lie the charges [announced] today allege that they gained access to the buffet of benefits generously given by the American taxpayer for needy Americans,” McDonald said. “In some cases, the victims of these crimes, the rightful beneficiaries of these funds, could not access benefits they needed. And why? That was because their identities had been stolen and their names had been already used in the programs to steal benefits. In other words, American citizens were boxed out of these programs because illegal aliens took their names to then take their money, or more accurately your money, the American taxpayer’s money. Illegal immigration carries real and substantial costs to American taxpayers and places enormous strain on our public benefits systems. And the further we look, the more fraud we find,” he added.