In 2012, a Queens man said, Officer James Frascatore pulled him over for a broken taillight, opened his car door and punched him three times in the mouth, unprovoked.
The following year, another Queens resident recalled, Officer Frascatore beat him in his driveway during an arrest after he started to go into his home to retrieve an identification card.
Those accounts, both made by black men, came to light after a rough arrest by the same officer on Wednesday in which he wrapped an arm around the neck of the retired tennis star James Blake and threw him to the sidewalk after mistaking him for a suspect in a credit card fraud investigation.