The Concord police made arrests yesterday following a report of an armed robbery late Wednesday at the North Main Street Hess station, but not the ones they expected. It turns out the alleged robber and victim were in cahoots to rip off the store together, the police said.

Just before midnight Wednesday, Angela Drown, 18, of Concord, called the police and said she'd been robbed while working at the Hess station. Drown told the police a white female had come in and demanded money and lottery scratch tickets, the police said.

Drown said the woman didn't display a weapon but said she had a gun, according to the police. Drown told the police the woman drove away in a green van after getting the money and the tickets.

The police later identified the robber as Desiree Manley, 22, of Concord, but have not said how. As detectives continued to investigate, they determined that Drown and Manley knew one another and had faked the robbery to steal the money and tickets, the police said.

Drown was charged with false report to law enforcement and criminal liability for the conduct of another. She was arrested Thursday night.

Manley was arrested yesterday after probation and parole officers found her and brought her to the police station, Lt. Keith Mitchell said. She was charged with theft by unauthorized taking. She was also charged with violating her probation or parole.

According to prison spokesman Jeff Lyons, Manley has been convicted of numerous offenses in recent years. She served jail and prison time in 2007 for a burglary conviction in Belknap County, Lyons said. She violated her probation in that case in 2008 by operating a car in Meredith after her license had been suspended, Lyons said.

She violated probation again in May when she was arrested by the Concord police and charged with criminal threatening, Lyons said. Corrections officials have issued a warrant for her arrest on another probation violation for the recent charge involving the Hess station, Lyons said yesterday.

The police declined to disclose how much money or how many tickets were taken in this week's robbery.