A 30-year Suffolk County police veteran and the former chief of detectives was named chief of department — the agency’s highest-ranking sworn officer — at a news conference in Hauppauge on Tuesday.

William Doherty' s Suffolk County Police Department career also includes a stint as deputy chief of patrol. Doherty had also served as commanding officer for Criminal Intelligence and Homeland Security, the Seventh Precinct and the Police Technology Bureau, police officials said.

"It's a humbling experience," Doherty said "All of a sudden you are responsible for 3,000 people and answer directly to the police commissioner. It's a lot of responsibility but a great opportunity."

Doherty replaces former Suffolk Chief of Department Robert Waring, who retired in July.

"This is a really good pol

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