Police said Marlisha Gatewood shot at the post office, called police to report the shooting, was at the scene when officers arrived and admitted to the shooting.
On Tuesday, the department released statistics for the various shots fired calls the department received from 6 p.m. on Dec. 31 through 2 a.m. on Jan. 1.
While the preliminary numbers are still considered unofficial, public safety officials have reported the second-sharpest single-year decline in murders since 1995.