New Haven Police Department Chief James Lewis is expected to announce in a press conference tomorrow morning that he will leave his post as head of the department, two city officials told the News on Tuesday night.

Board of Aldermen President Carl Goldfield said he was told by a high-ranking city official that Lewis will leave after City Hall finds his replacement. A high-ranking city official, speaking on the condition of anonymity, also confirmed Lewis’ departure.

“From what I’ve heard, he’s going to be leaving,” Goldfield said.

Although Lewis instituted polices that led to a 12 percent reduction in crime so far this year over last year, it is no surprise that Lewis is expected to announce his departure, Goldfield added. Lewis’ 18-month contract as police chief ends Jan. 31.

The high-ranking official said Lewis told top city officials about his decision to leave over the past week. Goldfield said Lewis is leaving in order to spend more time with his family. Lewis is not from New Haven.

NHPD spokesman Joseph Avery declined to comment when reached by a News reporter Tuesday night. City Hall spokeswoman Jessica Mayorga declined to confirm or deny Tuesday night.

Lewis came to New Haven after serving as a police chief in Wisconsin and California.