Off-duty officer in right place at right time, nabs would-be robber

A Chicago Police officer who was off duty interrupted an armed robbery of a Near West Side gas station last night – foiling it and catching the culprit.
 Donald Davis, 23, of the 7600 block of South Morgan Street, was charged with attempting to disarm a peace officer and attempted armed robbery.
Shortly after 9 p.m. the off-duty officer was already inside the Shell at 1160 W. Van Buren St. when the officer saw Davis, who was wearing a black skull cap, a white rag covering his face and red gloves, draw a handgun and point it at a staffer.
 Davis then threw a brown plastic bag on the counter and said: “Put all the money in here,’’ .
As the worker began opening the register, the officer informed Davis that he is an off-duty Chicago Police officer and ordered him to drop the weapon.
 As the officer was trying to place him into custody, Davis tried to disarm the officer and escape but the officer was able to keep control of the weapon and detain Davis with the help of the staffer