The assault happened near the Prospect Park stop on the B/Q line, police said.
The shooting was one of three that occurred within 12 hours in the neighborhood Tuesday and Wednesday.
Police Commissioner Bill Bratton said Tuesday there is "no specific credible threat" to New York.
A man targeting older people has struck three times in two weeks in Crown Heights, police said.
While the Oct. 11 incident was not classified a hate crime, a hate crimes detective is aiding the case.
The graffiti was found a week after a Jewish tenant moved into the President Street apartment building.
The latest assault came just a day after a 24-year-old Jewish man was punched in the face, police said.
Jadeocus Muhammad was turned himself in Monday for trying a rape a woman early Saturday, police said.
The incident took place at a bodega at the corner of Utica Avenue and Eastern Parkway.
Antoine Markens, 30, is accused of shooting a man in the stomach in Crown Heights.
Police said they caught the crew responsible for many recent burglaries in Prospect-Lefferts Gardens.
Both gunpoint muggings took place this month in the 71st and 77th precincts.
Thieves are entering rear windows to steal electronics, according to the 71st Precinct.
A 24-year-old was charged with participating in an attack that killed a 23-year-old, police said.
Lovelt Valentin, 23, was killed Saturday on Utica Avenue, according to police.
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