BANGOR — An Augusta woman described by authorities as the driving force behind a pharmacy robbery in the city has been sentenced to nearly four years in prison.

Stephanie McCormick was sentenced Tuesday to three years and 10 months behind bars and three years of probation.

The 23-year-old woman pleaded guilty in March to aiding and abetting the January robbery.

Prosecutors say her cousin, 20-year-old Anthony Post, pulled off the heist, handing a pharmacy worker a note demanding oxycodone and claiming he had a gun.

But authorities say McCormick planned the robbery, wrote the note, arranged for a getaway driver, and took a share of the stolen pills. A second woman, 26-year-old Candice Marie Eaton, was sentenced Wednesday to one and a half years in prison for being the getaway driver.