Federal prosecutors on Long Island filed new criminal charges against Rep. George Santos on Tuesday, accusing him of stealing people’s identities and making charges on his own donors’ credit cards without their authorization, and of lying to federal election officials.

The charges follow the indictment last week of Santos’ former campaign finance chief Nancy Marks. Prosecutors said they enlisted 10 family members without their knowledge to donate to the campaign to make it seem like Santos was getting enough support to qualify for GOP party funds.

According to the charges, Santos said he had lent his campaign $500,000 when in fact, he only had $8,000 on hand.

Rep. Santos' lawyer declined to comment when reached by ABC News.

Santos is due back in court on Oct. 27.

- ABC News' Will Steakin contributed to this report.