(CNN) Before Sgt. Kelvin Ansari became a Savannah police officer, he already had a long career in public service.

Ansari served 21 years in the US Army before joining the police department in Georgia. There, he worked his way from patrol officer to investigator to sergeant.

But his lifetime of public service ended Saturday night, when Ansari responded to a robbery investigation.

Officers approached a vehicle matching the description in the robbery call, and gunfire broke out, Savannah police said.

Ansari was shot and killed. Another officer was wounded but was treated and released. The suspect was also wounded and later died.

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