The separate incidents occurred on Fulton Street and Marcus Garvey Boulevard, the NYPD said.
Rasheed Thomas' military service ends next month, and he's looking for a new home and career.
The man was shot once in the chest, police said.
Private and city employers like the NYPD and FDNY will be at the fair.
Mayor Bill de Blasio said he believes the NYPD is back on track following arrest slowdown.
A report by the NYPD's new inspector general found "gaps" in discipline for officers in chokehold cases.
An employee of Food Train pocketed cash while he worked the register, according to a police report.
The NYPD commissioner owned up to a decrease in enforcement of low-level offenses by his department.
Deputy Inspector Martine Materasso said there was no truth to claims about a slowdown among officers.
Isiah Joseph, 15, was shot once in the back at Avenue H and East 56th Street Sunday, police said.
Jaquay Bennett, 19, was shot and killed on St. Marks Avenue Thursday afternoon, police said.
The boy was rushed to the hospital where he is in stable condition.
Police said a man and a woman stole cash from a cab driver.
NYPD rank-and-file anger at Mayor de Blasio could spill over onto Commissioner Bratton, sources say.
Alex Diaz, 15, and Ronald Espinoza, 14, were charged with robbery and assault.
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