OCTOBER 2006 — After a national — and secretive — search, Mayor Thomas M. Menino appoints Davis as commissioner of the Boston Police Department. Davis had engineered a more-than 50 percent drop in crime as head of the Lowell Police Department.
FEBRUARY 2007 — After only three months on the job, Davis unveiled several new initiatives, including centralizing the department’s detective units, community policing strategies, and a computer statistics system to help police track crimes.
NOVEMBER 2007 — Three BPD officers plead guilty to cocaine trafficking after getting caught in FBI sting.
SEPTEMBER 2007 — Suffolk District Attorney Daniel F. Conley and Davis have a public fight over personnel moves in the homicide unit as the city grapples with a low rate of solved murders.
JUNE 2008 — David Woodman, 22, falls unconscious then lapses into a coma after struggling with police following the Celtics championship win over the Los Angeles Lakers. The officers were cleared of any wrongdoing, but the city paid Woodman’s family $3 million, and the police had to change policies about how to handle arrests during large demonstrations.
MARCH 2009 — Facing budget cuts for only the second time in the Police Department’s history, Davis is forced to lay off 60 people: 20 civilians and 40 cadets.
SEPTEMBER 2010 — Five people are gunned down on Woolson Street in Mattapan — including a woman and her 2-year-old son, cradled in her arms — in the worst rampage in Boston since 2005. The shooting left four dead and one man critically wounded and touched off waves of anger from public officials and residents of a neighborhood already plagued by violence.
DECEMBER 2010 — After years of decreasing crime, 2010 statistics show a sharp increase in homicides — nearly 50 percent — including killings of at least three 14-year-olds. With just one day to go before the end of the year, only 27 of the 72 killings reported, about 38 percent, have been solved.
DECEMBER 2011 — BPD successfully clear Dewey Square of the Occupy Boston protestors. Dozens are arrested, but the sweep is peaceful.
APRIL 2013 — After the Boston Marathon bombings, Davis is praised nationally for his leadership and calm demeanor.
AUGUST 2013 — Davis is rumored to be a candidate for a top Homeland Security post.
SEPTEMBER 12 — Davis is criticized by the Massachusetts Association of Minority Law Enforcement Officers, who accuse him of not doing enough to promote minorities to leadership positions. Davis defends his record on diversity, pointing out that 42 percent of his command staff are minorities.
SEPTEMBER 2013 — Davis announces he will step down.