An 11-year state employee is facing felony drug charges for allegedly bringing cocaine and marijuana to her job at the auditor's office.

Kathryn Sorensen, 32, of Boise, was arrested Wednesday night by Boise Police while working the swing shift as computer operations supervisor on the fifth floor of the Joe R. Williams Office Building.Sorensen was arraigned Thursday in Ada County Magistrate Court and faces a preliminary hearing Jan. 4.

She is charged with felony counts of possessing marijuana with intent to deliver, possessing cocaine, and possessing ephedrine, a prescription drug commonly used to relieve asthma, Deputy Prosecutor Roger Bourne said.

A fourth misdemeanor charge accuses her of possessing drug paraphernalia.

Auditor J.D. Williams said Friday he was stunned by news of the arrest.

"Her work performance has been excellent. From a work perspective, she has done her job very well," he said.

Pending a resolution of the criminal case, Sorensen has been placed on administrative leave without pay.

Williams said a fellow employee noticed Wednesday what appeared to be illicit drugs on Sorensen's desk. The employee notified a supervisor, who then alerted police.

Williams said the informant's awareness may have been heightened because state workers have recently been asked to sign agreements pledging to maintain a "drug-free" workplace.

"Our policy in this office is we don't condone it one iota," the auditor said.