Mike Masterson, who has served as chief of police since 2005, announced Thursday he plans to leave the department.
"He hasn't made a formal announcement but he does plan to retire before the end of the year," Boise police spokeswoman Lynn Hightower said.
Masterson came to Boise following the 2004 resignation of former Chief Don Pierce. Newly elected Mayor Dave Bieter had asked Pierce to resign over criticism from the Boise City Council for conducting what they said was a sloppy initial probe into a taxpayer-funded junket to New York City by previous Mayor Brent Coles. Coles also resigned over the scandal.
Masterson had been a captain in the Madison Police Department in Wisconsin. He began his law enforcement career there in 1977.
Masterson's early announcement will give the city more than eight months to recruit candidates interested in becoming chief. Mayor Dave Bieter will establish the recruitment process, city spokesman Adam Park said.