Oscar Jiggetts, 55, attacked writer Marianna Milkis-Edwards, sources said.
Samuel Thorton punched the officer in the face and stole her gun, police said.
Surveillance video revealed the owner never went to the area of the purported attack, sources said.
The robbery happened on Monday in Crown Heights, police said.
Police are looking for five suspects they say are involved in three different robberies on the J train.
The man and his accomplice stole two pricey bags from a Park Slope boutique, according to police.
They stole $433, cellphones and the food in the March muggings, police said.
A man was robbed after suspects hit him in the head with a hard object, police said.
The female suspect has approached two women and demanded they hand over their property.
The muggers fled at Columbus Circle, police said.
The attack took place inside the Drew-Hamilton Houses on Feb. 2, police said.
Jovan Frederick, 32, faces attempted murder, assault and robbery charges, police said.
Surveillance video showed the woman resisting the man's attempt to rob her on Hester and Ludlow streets.
Police are looking for an armed man who stole a woman's purse on East 80th Street.
The victim was walking home from the subway on Dec. 30 when he was approached from behind.
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