Another federal prosecutor from the Northern District of Illinois has left for Big Law, with Jenner & Block adding Andrianna "Annie" Kastanek as a partner in its Chicago office.

Kastanek, who spent about 12 years in the U.S. Attorney's Office as an assistant U.S. attorney, deputy chief of appeals and chief of appeals, joins Jenner's appellate and Supreme Court practice as well as its investigations, compliance and defense practice, the firm said Wednesday.