AUGUSTA — A 22-year-old city woman was arrested today in connection with the Jan. 22 robbery of the CVS pharmacy on Stone Street, police said.

Augusta police and FBI agents arrested Stephanie L. McCormick, of Augusta, on a federal warrant on Gage Street about 1 p.m. today, according to a news release from Augusta Police.

She faces a federal charge of interference with commerce by robbery, which carries a maximum sentence of 30 years. McCormick allegedly aided and abetted the theft of prescription drugs.

Police last week arrested Anthony Post, 19, of Auburn, for allegedly walking up to the prescription counter at the CVS and passing a note to a pharmacy technician demanding drugs. The note stated, “Quickly & Calmly put All oxycodone in bag If not I have a gun & will start shooting No Scene!”

Police said Post since confessed to robbing the CVS, after he was identified on surveillance photographs.

An affidavit filed in connection to McCormick’s arrest by Cameron Mizell, a special agent with the FBI, claims McCormick told police she and Post had planned together to rob the Walgreens pharmacy in Augusta. But that Post lost his nerve and left the Walgreens store and instead held up the CVS.

Mizzel’s affidavit says McCormick confessed to writing the note used in the CVS robbery, other than the words “start shooting.”

Police allege McCormick and two other people who aren’t identified gave Post a ride to the Stone Street CVS and waited for him to rob the pharmacy. When Post returned to the vehicle, with a plastic CVS bag in his hand, McCormick told police she got 40 pills of 30 milligrams each from what Post had taken. She told the FBI agent she “shot up” some of the drugs that night and had used the rest of the pills since then.

The FBI affidavit states McCormick said she gave Post clothing used to cover his identity during the robbery.

Federal agents are involved in the case under a special agreement with city police in attempt to stem the mounting number of pharmacy robberies.