BOSTON -- When Tina Drouin’s mother mailed her a batch of “power soup” this week to fight the winter weather, she didn’t realize that her daughter would actually be fighting crime.

WATCH: Candy Store Clerk Stops Alleged Armed Robber

NewsCenter 5’s Jim Morelli reported that Drouin was working at Bon Bon, a South End candy store, on Saturday evening when a man sought by police for a string of armed robberies walked into the store.

Drouin said that he approached the ice cream counter and handed her a note reading, “Give me the money quietly and no one will be shot.”

But instead of opening up the register, Drouin told the man he was being filmed by the store’s security cameras and called police as he grabbed back the note and made a quick exit.

Police spotted the man on a nearby street and identified him as Preston Jackson, 42, of Mattapan, a suspect sought for a recent hold-up at Starbucks on Brookline Avenue and four Back Bay heists in December.

Jackson allegedly dropped the handwritten note from the robbery attempt on the street while he was being handcuffed.

Jackson was charged with attempted armed robbery, and will face additional charges for the prior robberies.

“Your ‘power soup’ worked,” Drouin told her mother over the phone on Sunday. “It made me brave.”