An investigation has been opened into allegations that during her 23 days in jail Paris Hilton received special treatment, according to authorities. Hilton was sentenced to do jail time for violating her probation in an alcohol-related driving case.

Sheriff’s spokesman Steve Whitemore said allegations were also made that Hilton received a new jail uniform instead of the recycled ones given to the other inmates, and that Hilton’s mail was delivered by a captain instead of inmate trusties.

The department underwent scrutiny when Sheriff Lee Baca released 26-year-old Hilton from jail after three days for medical reasons. She was sent back to jail just one night later.

“We’re going to investigate it and get to the bottom of it and find out exactly what happened,” Whitemore said.

The sheriff’s department will also examine whether Hilton was given free access to a cordless phone rather than being forced to wait in line to use a pay phone during certain hours. These allegations were brought to the attention of the Association for Los Angeles Deputy Sheriffs by union members, according to the Los Angeles Times‘ Web site.

Hilton’s spokesman did not immediately return a message for comment.