The sergeant had found men stripping a car before he was threatened with a knife, police said.
Officers had seen Wilvinson Diaz shoot a 21-year-old man, officials said.
Dalton Branch killed his ex-girlfriend outside Resorts World Casino, police said.
Detectives Vincente Matias and Harold Carter suffered head injuries from the fight, police said.
The officers were responding to a Brownsville dispute when the dog charged at them, police said.
An officer shot Brian Quattrocchi as he stabbed his ex-girlfriend Monday night, police said.
The officers were responding to a report of a domestic assault at 1230 Hancock St., police said.
The shooter was arrested near East Tremont Avenue and Westchester Avenue, sources said.
Calvin Peters stabbed Levi Rosenblat in the head inside 770 Eastern Parkway, officials said.
Officer Peter Liang fatally shot Akai Gurley in what officials said was an "accidental discharge."
Leighton Friday, 19, hit an officer in the head during an alleged burglary in Jamaica Monday.
Two officers shot the suspect after the attack in Jamaica, police said.
Police shot and killed a man who threatened hospital staff with a box cutter, the NYPD said.
Juan Rosario was shot in the torso while stabbing his wife in Kingsbridge Heights, police said.
Francisco Carvajal was shot dead inside the Ocean Parkway home of his ex-girlfriend, police said.
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