Here is a more recent link. Now reports 6 dead including the officer. My late father lived in Jersey City for a number of years in the basement of his 4 unit rental building. A very mixed bag, Section 8, drug dealers, and well behaved immigrants. He was really afraid to do anything about the drug dealers for fear of reprisals.
https://www.aol.com/article/news/2019/12/10/6-killed-in-nj-gun-battle-including-police-office
I don’t know if the link will come up. It may need the letter r after office at the end.