It took a new defense attorney to notice that the anti-anxiety drug a Colorado woman was convicted of possessing is not a substance controlled by drug laws.

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Prosecutors, the previous defense attorney and even the judge said they were unaware that Buspirone was not a controlled substance, as police alleged when they arrested Allysan Isaac last year, the Rocky Mountain News reported.

"You were incarcerated for a case that was not a crime," Mesa County District Judge Brian Flynn said Tuesday.

Isaac, 24, however, had some additional legal troubles to deal with as a result of her guilty plea to possessing the anti-anxiety drug.

While serving a year of work release following a 90-day stint in jail, Isaac shared another prescription drug with an inmate. That drug, Clonazepam, is a controlled substance, for which the judge Tuesday sentenced Isaac to probation and mental health treatment.