Investigators search for motive in California shooting rampage

On Thursday, authorities investigated the scene where a police shootout took place in San Bernardino, Calif.

Jae C. Hong/AP

Among the possible motives behind the attack that left 14 dead: some kind of workplace grudge or terrorism, according to the FBI.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2015/12/03/BostonGlobe.com/National/Images/2015-12-03T163330Z_561007846_GF20000083870_RTRMADP_3_CALIFORNIA-SHOOTING-OBAMA.jpg California shooting may be related to terrorism, Obama says

Law enforcement authorities have not yet identified a motive for the mass shooting.

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A picture began to emerge Wednesday night of how the couple hid their plan from even close relatives.

The Board Game

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2015/11/27/BostonGlobe.com/Business/Images/ryan_larson2_biz-001.jpg Companies slow to add women, minority directors

The majority of corporate directors in Mass. are white men, even though women and minorities make up most of the population.

DANTE RAMOS

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2015/12/02/BostonGlobe.com/EditorialOpinion/Images/dante_ramos-1679.jpg Donald Trump is truly tasteless

The Republican front-runner is reviving the cruel humor of the ?80s, but his message is anything but a joke.

Scott Chandler lends a helping hand to Patriots tight end Rob Gronkowski after Gronkowski suffered a knee injury in last week?s loss to the Broncos.

Joe Mahoney/AP

It?s time to help defenseless receivers, Tom Brady says

In the wake of the injury to Rob Gronkowski, the Patriots quarterback said the NFL needs to act.

home of the week

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2015/12/01/BostonGlobe.com/Business/Images/dtlumacki_houseofweek_biz08.jpg Pembroke Cape charms with addition, modern upgrades

This 77-year-old Cape has been transformed into a home with surprises around every corner.

Stat

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2015/12/03/BostonGlobe.com/Business/Images/genes150-5842.jpg Dare we edit the human race? Geneticists wrestle with their power

The development of the CRISPR-cas9 gene-editing system has changed the landscape.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2015/12/03/BostonGlobe.com/Metro/Images/skate150-9869.jpg MIT police put halt to ?wheeled devices? in school?s hallways

Police at the school say there has been an uptick in students riding through school buildings on wheels.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2015/12/03/BostonGlobe.com/Business/Images/hancock3_BIZ-5877.jpg John Hancock puts financial support behind Boston Marathon documentary

?Boston? is the first feature-length documentary film about the marathon?s rich history.

Xaverian is shooting for back-to-back state titles.

High school football

Scouting the 2015 MIAA Super Bowls

Twelve teams will battle for six state titles at Gillette Stadium on Saturday.

illustration by Josue Evilla for The Boston Globe

Inside DraftKings? war room as fantasy sports battle rages

How the nerds who built a billion-dollar powerhouse are struggling to save their industry.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2015/11/26/BostonGlobe.com/ReceivedContent/Images/shooting3.jpg Suspect arrested in connection with Fenway bar slaying

A Dorchester man was arrested on gun-related charges in connection with the Thanksgiving Day shooting.

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Ashton Carter will open all military combat jobs to women in a historic change, an official said.

A pedestrian made her way down the City Hall Plaza steps on a dreary November day.

Lane Turner/Globe Staff

El Nino to fend off polar vortex ? but snow could still fall

Forecasters expect the recent trend of mild weather to continue into January for large swaths of the US, including New England.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2015/12/03/BostonGlobe.com/National/Images/warren150-2034.jpg Top Warren aide Mindy Myers departs for DSCC

The chief of staff to Senator Elizabeth Warren moves to the Democratic Senatorial Campaign Committee next month.

Cambridge Officer Adam Betts greeted parents and students outside the combined entrance of the Putnam Ave Upper School and the Kennedy-Longfellow School on Spring Street in Cambridge.

Aram Boghosian for The Boston Globe

Cambridge steps up security at all public schools

A second e-mail threat this week has prompted an increased police presence at all city school buildings.

Hydropower firms, power-line developers push energy bill

The two sides have united behind a singular cause: bringing hydropower into the state from Canada.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2015/10/20/BostonGlobe.com/Foreign/Images/ce54130a0a3a4b669e3ee31b89c476e5-c78950ab2e4a4bf7bb5dcd24d35e1f9a-0-986.jpg South African appeals court convicts Pistorius of murder

The court on Thursday convicted Olympian Oscar Pistorius of murder, overturning a lower court?s conviction.

Sponsored by Suffolk University

Making low voter turnout a high priority

Suffolk University Professor Rachael Cobb shares what?s keeping voters from the polls and what needs to change to get them to show up on Election Day.

This content was produced by Boston Globe Media in collaboration with the advertiser. The news and editorial departments of The Boston Globe had no role in its production or display.

Ground Game

Ground Game

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2015/11/30/BostonGlobe.com/Metro/Images/497297304.jpg Could Martin O?Malley get zero delegates in Iowa?

This is a strong possibility for a candidate who has spent more time campaigning in the Hawkeye State than his primary rivals.

Globe Santa

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2015/11/25/BostonGlobe.com/Special/Images/santa_logo[1]-U80342642589InF--90x90@BostonGlobe.com.jpg Donate to Globe Santa

Globe Santa delivers holiday gifts to local children in need.

Globe investigations

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2015/11/18/BostonGlobe.com/Metro/Images/spotlight150x150-165.jpg Globe investigations and Spotlight reports

A look at high-impact investigations from The Boston Globe, including the Pulitzer Prize-winning report on abuse in the Catholic Church.

The story behind 'Spotlight'

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2015/11/18/BostonGlobe.com/Metro/Images/spotlight-9497.jpg Boston Globe coverage and the movie ?Spotlight?

?Spotlight? is based on the stories and the reporters behind the investigation of sexual abuse in the Catholic Church.

The Big Picture

Craig F. Walker/Globe Staff

Globe photos of the month: November 2015

A look at some of the best images taken by Globe photographers last month.