A leading misinformation expert is being accused of citing non-existent sources to defend Minnesota’s new law banning election misinformation.

At the behest of Minnesota Attorney General Keith Ellison, Hancock recently submitted an affidavit supporting new legislation that bans the use of so-called “deep fake” technology to influence an election. The law is being challenged in federal court by a conservative YouTuber and Republican state Rep. Mary Franson of Alexandria for violating First Amendment free speech protections.

Hancock’s expert declaration in support of the deep fake law cites numerous academic works. But several of those sources do not appear to exist, and the lawyers challenging the law say they appear to have been made up by artificial intelligence software like ChatGPT.