Thieves stole thousands of dollars worth of items from the store at Broadway and West 73rd Street.
The teen intervened when a man was attacked on 37th Avenue on Thursday morning, police say.
Overall crime in the 112th Precinct decreased this year by almost 8 percent so far.
A 55-year-old man was forced into a car and then driven to Staten Island Dec. 1, police say.
Deputy Inspector Kevin Maloney will lead the precinct, taking over for Deputy Inspector Stephen Cirabisi.
Police warned residents in Prospect Heights and Crown Heights about a recent uptick in burglaries.
A 49-year-old man was struck on State Street by a 23-year-old man.
Roosevelt Avenue near 90th Street was the site of two recent murders in the neighborhood.
The thief took decorations including a pumpkin, a witch and a large spider, police say.
Burglary is the sole crime category in the area that is up.
The GOP mayoral candidate said frontrunner Bill de Blasio has no idea how to properly keep the city safe.
Police said Pedro Silva, of Jackson Heights, shot 33-year-old Ivan Rodriguez in the neck and head.
A fight broke out in Carroll Park, Sept. 16, and later, gunshots were fired nearby, according to police.
Nearly 250 additional people were locked up each day for minor crimes during the peak arrest year.
Two women were harassed by a stranger on Sixth Avenue, police said.
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