DETROIT -

Federal authorities in Detroit have filed a new document outlining criminal charges against a New York man accused of cyberstalking women and using the Internet to commit extortion.

The eight charges against Adam Savader of Great Neck, N.Y., were filed Monday as a criminal "information," which means a guilty plea is expected. A message seeking comment was left with his attorney.

Savader is accused of threatening to release nude photos of young women unless they sent some to him. Many were college students in Michigan and elsewhere who knew him.

A court filing says Savader called himself John Smith when he sent text messages to women over a Google phone service. Authorities say he got access to nude photos through hacked accounts that belonged to the women.