A South Boston man allegedly confessed his guilt immediately after Boston Police gave him his Miranda rights following his arrest for the robbery of a Back Bay pharmacy, Suffolk County District Attorney Daniel F. Conley said.

COLLIN M. WALLACE (D.O.B. 7/9/89) was arraigned in the Boston Municipal Court this morning on charges of armed robbery and resisting arrest. At the request of Assistant District Attorney Elle Rackmann, Judge Shannon Frisson set his bail at $10,000.

Rackmann told the court that Boston Police responded to the CVS Pharmacy at 587 Boylston St. at about 8:15 last night for a report of an armed robbery. Advised that the perpetrator was wearing a green Boston Celtics sweatshirt and carrying a black backpack, one officer began chasing a suspect believed to be the robber.

Another officer took a statement from store personnel who said the assailant had approached the cash register, where the store manager and two employees were standing. With one hand beneath his sweatshirt as if carrying a weapon, the assailant allegedly said to the manager, “Tell her to put the money in a bag before things get ugly.”

The employee emptied two cash registers, placed the money in a white CVS shopping bag, and gave it to the assailant. The assailant then fled on foot.

Boston Police were able to stop the fleeing suspect after a foot pursuit on Arlington Street. In the course of that pursuit, one officer fell and suffered an injury to his ear. When stopped, the suspect – later identified as Wallace – not only matched the suspect’s description but also had a white CVS shopping bag sticking out of his waistband. Inside was a large quantity of cash. Two CVS employees were able to identify Wallace as the robber during a bring-back identification procedure.

In light of the clothing description, shopping bag, cash, and positive identifications, Boston Police placed Wallace under arrest for armed robbery and resisting arrest. Perhaps recognizing the weight of the evidence assembled against him, Wallace allegedly gave up the ghost.

“I did it,” he allegedly said to the officers. “I plead guilty right now.”

Wallace apparently reconsidered his statements, however, and a plea of not guilty was entered on his behalf this morning. He was represented today by attorney Paul Derby and will return to court on Feb. 17.