U.S. District Judge Brian Cogan in Brooklyn also ordered Mattis, a former associate at law firm Pryor Cashman, to pay $30,107 in restitution to New York City and to serve one year of supervised release.
Attorneys for Mattis did not immediately respond to a request for comment.
Prosecutors had recommended an 18 to 24-month sentence for Mattis, arguing that targeting a police car with "homemade firebombs is extremely dangerous criminal conduct that warrants a serious sentence." They made the same recommendation for Mattis' co-defendant, Urooj Rahman, who was sentenced to 15 months in prison in November.
Mattis requested a time-served sentence, followed by a year of supervised release so he can remain at home with his children.
Rahman, a former public interest lawyer who represented Bronx tenants, and Mattis both pleaded guilty in June to conspiracy to commit arson and possess an explosive device.
Prosecutors said Rahman threw a gasoline-filled bottle through the police car's already-broken window and fled in a minivan driven by Mattis in the early morning hours of May 30, 2020.
The incident took place during protests in New York days after Floyd, a Black man, was killed by a white Minnesota police officer who was later convicted of murder in the case. Police made scores of arrests during the New York protest.
A New York appeals court disbarred both Rahman and Mattis in November.
(Reporting by David Thomas; Editing by David Bario and Christopher Cushing)
By David Thomas
