PROVO — Police say an astute librarian helped them arrest a man who is accused of using library computers to make fraudulent medication prescriptions.

Police responded to the library when the librarian called with her suspicions.

Officers saw the man altering a prescription document for OxyContin at the Spanish Fork Library, 49 S. Main, according to a police affidavit filed in 4th District Court.

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The man printed out the document and was going to leave when police stopped him, according to the affidavit.

During a search, police discovered the man had a copy of someone else's identification in his pocket. The name on the ID matched the name on the fraudulent prescription, the affidavit states.

The 25-year-old Spanish Fork man was arrested and booked into the Utah County Jail for investigation of forgery and possession of another's ID on $5,000 cash-only bail.

He will appear in court on July 18 at 8:30 a.m.