"She's not charged with anything," district attorney's spokeswoman Jane Robison tells the Associated Press of the subpoenaed Hilton, 24. "She just happens to be a witness."
The charges in the case are against Darnell Riley, 28, who was arrested Jan. 22, 2004, for allegedly breaking into the home of Girls Gone Wild creator Joe Francis and attempting to kidnap him, Robison said. Hilton briefly dated Francis in 2003.
Riley, who reportedly is currently being held in the Los Angeles County Jail, pleaded not guilty, according to his attorney, Ronald Richards. A preliminary hearing is scheduled for Nov. 21.
The hotel heiress was delivered her subpoena at her Hollywood Hills home last week. Her spokesman, Elliot Mintz, said she will "comply with the law" but "I don't see what contribution, if any, she's going to be able to make in that case."