Gunman a case of ?homegrown extremism?

Authorities delved into the background of American-born Omar Mateen, who opened fire at the crowded Orlando club.

Family members of victims of the shooting left the Orlando Medical Examiner?s Office.

Alan Diaz/Associated Press

Family members of victims of the shooting left the Orlando Medical Examiner?s Office.

Family members were overcome with emotion behind the Beardall Senior Center in Orlando.

Curtis Compton/Atlanta Journal & Constitution via AP

Family members were overcome with emotion behind the Beardall Senior Center in Orlando.

Two women placed flowers for the victims at Pulse Orlando.

Chris O?Meara/Associated Press

Two women placed flowers for the victims at Pulse Orlando.

ORLANDO SLIDER 3 Police forensic investigators work at the crime scene of a mass shooting at the Pulse gay night club in Orlando, Florida, June 13, 2016. REUTERS/Jim Young

JIM YOUNG/reuters

Forensic investigators worked at the crime scene.

President Barack Obama spoke from the Oval Office about the deadly Orlando shooting.

SAUL LOEB

President Barack Obama spoke from the Oval Office about the deadly Orlando shooting.

ORLANDO SLIDER 2 ORLANDO, FL - JUNE 13: Ray Rivera draws a diagram showing the inside of the Pulse Nightclub where he was DJing when Omar Mateen walked in (show by the arrow to the right) and allegedly killed at least 50 people on June 13, 2016 in Orlando, Florida. The mass shooting killed at least 50 people and injuring 53 others in what is the deadliest mass shooting in the country's history. (Photo by Joe Raedle/Getty Images)

Joe Raedle/getty images

Ray Rivera drew a diagram showing the inside of the Pulse nightclub.

ORLANDO SLIDER 3 Law enforcement officials investigate the rear of Pulse Orlando after a shooting involving multiple fatalities at the nightclub in Orlando, Fla., Sunday, June 12, 2016.(AP Photo/Phelan M. Ebenhack)

Phelan M. Ebenhack/associated press

Law enforcement officials investigated at Pulse Orlando.

ORLANDO SLIDER 2 HONG KONG - JUNE 13: People gather during a vigil for the victims of a shooting in a gay nightclub in Orlando, Florida on June 13, 2016 in Hong Kong, Hong Kong. The vigil is put together by Betty Grisoni co-director of Pink Dot and co-founder of local lesbian group Les Peches with Double Happiness, Les Peches, Out in HK and Pink Alliance joining in as supporting organisations. (Photo by Anthony Kwan/Getty Images)

Anthony Kwan/getty images

Mourners participated in a vigil in Hong Kong.

ORLANDO SLIDER 2 Australians gather to place candles and flags in Sydney on June 13, 2016, in solidarity with the global gay community after a gunman opened fire in a nightclub in Orlando, Florida, killing over 50 people. The Sydney Harbour Bridge was lit with the colours of the rainbow on June 13 as hundreds of Australians gathered to stand in solidarity with the global gay community after the worst mass shooting in modern US history. / AFP PHOTO / WILLIAM WESTWILLIAM WEST/AFP/Getty Images

WILLIAM WEST/afp/getty images

Australians gathered to place candles and flags in Sydney.

ORLANDO SLIDER 2 White roses and rainbow flags are displayed in front of the US Embassy in Berlin on June 13, 2016 as people pay tribute to the victims of the Orlando killing. Fifty people died when a gunman allegedly inspired by the Islamic State group opened fire inside a gay nightclub in Florida, in the worst terror attack on US soil since September 11, 2001. / AFP PHOTO / John MACDOUGALLJOHN MACDOUGALL/AFP/Getty Images

JOHN MACDOUGALL/afp/getty images

White roses and rainbow flags were displayed in front of the US Embassy in Berlin.

ORLANDO SLIDER 2 HONG KONG - JUNE 13: People take part in a candlelight vigil for the victims of a shooting in a gay nightclub in Orlando, Florida on June 13, 2016 in Hong Kong, Hong Kong. The vigil is put together by Betty Grisoni co-director of Pink Dot and co-founder of local lesbian group Les Peches with Double Happiness, Les Peches, Out in HK and Pink Alliance joining in as supporting organisations. (Photo by Anthony Kwan/Getty Images)

Anthony Kwan/afp/getty images

People took part in a candlelight vigil in Hong Kong.

ORLANDO SLIDER 2 Flags fly at half-staff around the Washington Monument at daybreak in Washington with the US Capitol in the background Monday, June 13, 2016. President Barack Obama ordered flags lowered to half-staff to honor the victims of the Orlando nightclub shootings. (AP Photo/J. David Ake.)

J. David Ake/associated press

Flags flew at half staff around the Washington Monument.

ORLANDO SLIDER 2 A woman prays during a candlelight vigil in solidarity for the victims of the Orlando gay nightclub mass shooting, in Seoul, South Korea, June 13, 2016.REUTERS/Kim Hong-Ji

KIM HONG-JI/reuters

A woman prayed during a candlelight vigil in solidarity in Seoul, South Korea.

Evan Horowitz | Quick Study

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/01/05/BostonGlobe.com/Politics/Images/wiggs_weaponds_22147-181--90x90.jpg How tight is gun control in Massachusetts?

Massachusetts, with its strict laws, has about 70 percent fewer gun deaths than the national average.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/06/13/BostonGlobe.com/Metro/Images/539719110.jpg Nearly 6,000 people have been fatally shot in the US so far this year

That averages out to more than 1,000 people killed by guns per month, or more than 36 shooting deaths per day.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/06/13/BostonGlobe.com/Metro/Images/AFP_BU0JU.jpg Orlando shooter called Tsarnaevs his ?homeboys?

Omar Mateen made the statement in one of three conversations with a police dispatcher, FBI Director James Comey said.

EDITORIAL

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/06/12/BostonGlobe.com/EditorialOpinion/Images/6de7d6c07d48460abb7a77034fc4eb1d-6de7d6c07d48460abb7a77034fc4eb1d-0.jpg Prayers aren?t enough. The US needs fewer guns.

The common thread in too many mass shootings is the availability of powerful semiautomatic weapons that serve no purpose but to kill.

Donald Trump spoke during an event at St. Anselm College.

Trump reiterates call to restrict immigration from Middle East

Donald Trump says he wants to ??suspend immigration from areas of the world where there is a proven history of terrorism.??

Donald Trump spoke in N.H.

Trump says he will revoke Washington Post press credentials

It was not immediately clear what prompted the campaign to take action against the newspaper.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/06/13/BostonGlobe.com/Politics/Images/clinton4.JPG After Orlando shooting, Hillary Clinton pushes for unity

The presumptive Democratic nominee vowed to make stopping ?lone wolf? attacks a top priority if elected president.

KEVIN CULLEN

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/06/13/BostonGlobe.com/Metro/Images/Kevin_Cullen_150px-10879.jpg Orlando shooter was very similar to Boston Marathon bombers

No surprise that a murderous, disaffected loser would look up to two other murderous, disaffected losers.

The oldest 13-stars-and-stripes American flag available for public view is at the Commonwealth Museum.

James Mooney

Rare Revolutionary War-era flag to go on display in Boston

It?s the oldest 13-stars-and-stripes American flag that?s available for public view, the owners say.

Alex Speier

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/06/13/BostonGlobe.com/Sports/Images/539304066.jpg Red Sox need to add pitching, but at what price?

In a year of potentially limited arms, there could be a drastic cost to making a move.

tech lab

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/06/13/BostonGlobe.com/Business/Images/Hiawatha_Bray_150px-6004.jpg Microsoft bets on the Business Network

The software giant is spending $26.2 billion to buy the social network LinkedIn. The deal is about business, not friends.

South Boston school redevelopment falls through

The redevelopment of the Gate of Heaven School building had become a flashpoint in the debate about gentrification in Southie.

Another ferry to travel to the Cape & Islands is ready

The Steamship Authority will usher in a new ferry that will service two routes.

Love Letters

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/06/13/BostonGlobe.com/Lifestyle/Images/Meredith_Goldstein_150px-4930.png She wanted a fling, but now feels trapped by his illness

I feel so shallow and selfish and cruel, but at the same time it also seems wrong to live a lie.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/06/13/BostonGlobe.com/Business/Images/b75fd5dd7b1b4567b78a11bdc94d86c0-29c3c751e71947cc8ad6bb60af98d8bd-0.jpg DraftKings and FanDuel reportedly in merger talks

Bloomberg reported that investors in the two privately-held companies have been pushing for the companies to combine.

Walsh commends Boston Latin graduates for race dialogue

?I want to thank you for holding those conversations,? Walsh told the class of 2016. ?Ultimately, they will make our city stronger.?

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/06/13/BostonGlobe.com/Metro/Images/18SevenThings01[1]-8907-10897.jpg Mass. House is subpoenaed in Brian Joyce probe

The Mass. House of Representatives has received a subpoena from federal prosecutors investigating state Senator Brian Joyce.

Legislators blast exploring privatizing T warehouse jobs

A plan to outsource 38 jobs in the MBTA?s warehouse operations drew the ire of the Boston Carmen?s Union and several legislators.

On Mount Washington, the snow is still falling

Just as New Englanders begin to head out to the beach in droves, Mount Washington was sprinkled with nearly four inches of snow.

Second of Two Parts

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/06/10/BostonGlobe.com/Metro/Images/tlumacki_pamscamhumboltave_metro040.jpg Nonprofits have questionable dealings with the Pam family

Valuable properties owned by a pair of charities were peddled to the Roxbury family?s businesses under highly favorable terms.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/06/13/BostonGlobe.com/Metro/Images/cf16d3dfcf7741518c9e0dd6142cfc4a-aed2301f0e114cdba9be61673d739219-2-11033.jpg Review says courts handled Zambrano case properly

Jorge Zambrano shot and killed Auburn Police Officer Ronald Tarentino Jr. in May after being arrested six times in 2016.

Opinion & Ideas

EDITORIAL

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/06/12/BostonGlobe.com/EditorialOpinion/Images/6de7d6c07d48460abb7a77034fc4eb1d-6de7d6c07d48460abb7a77034fc4eb1d-0.jpg Prayers aren?t enough. The US needs fewer guns.

The common thread in too many mass shootings is the availability of powerful semiautomatic weapons that serve no purpose but to kill.

Life sciences

STAT, a national publication from Boston Globe Media Partners, covers health, medicine, and life sciences.

The Big Picture

People hold candles as they share a minute of silence during a vigil for the victims of the Orlando shooting in Florida, in Hong Kong on June 13.

Anthony Wallace/AFP/Getty Images

Mourning the Orlando shooting

Mourners from around the world are grieving the victims of the Orlando nightclub shooting.

Globe must-reads

New York art collector and philanthropist Charlotte Feng Ford.

NAMES

Alum gives Smith College $2.5m endowment

8/5/05 -- OPS -- July 8, 1974 photo -- Mike Cullar and Jim Palmer

DAN SHAUGHNESSY

Jim Palmer one of baseball?s timeless treasures
FILE - In this July 26, 1956 file photo, the Italian luxury liner Andrea Doria keels far over to starboard before sinking 225 feet to the bottom of the Atlantic 45 miles off Nantucket Island, Mass. Nearly six decades after the Andrea Doria slammed into another ocean liner, killing 46 people, explorers are preparing to do what 16 others have lost their lives attempting: get a fresh glimpse of the wreckage on the sea floor. Everett, Washington-based OceanGate will use a five-person submarine in June 2016 to get high-definition video and 3-D sonar images of the shipwreck. (AP Photo/John Rooney, File)

What did a submarine find at the wreck of the Andrea Doria?

Hull, MA - 8/2/2015: The Boston Lighthouse stands tall on Little Brewster Island on Aug 2, 2015. Boston Light is America's oldest light station in America. (Harrison Hill for The Boston Globe)

Nation?s oldest lighthouse station celebrates 300 years
From left: J.B. and Tiffany Dowd, Tonya and Ben Mezrich at the MFA Museum Council's Summer Party.

Names

Hundreds attend MFA?s annual Summer Party
Mover Kit is a wearable ?active play? doodad that reacts to movement with?light and can be programmed into an endless number of new toys.

Michael Andor Brodeur | @Large

A new wave of toys and apps for lil? coders
Panos Panay, cofounder of the Open Music Initiative, is uniting university researchers with major players in the music field.

Can major initiative led by Berklee solve music-rights problems?
?Portrait of a Young Married Couple?

Frame by Frame

When a man loves a woman ? and he doesn?t stand a chance
Democratic presidential candidate Bernie Sanders (left) says he?ll meet with rival Hillary Clinton on Tuesday.

Sanders to meet Tuesday with Clinton to discuss agenda
White roses and rainbow flags are displayed in front of the US Embassy in Berlin on June 13, 2016 as people pay tribute to the victims of the Orlando killing. Fifty people died when a gunman allegedly inspired by the Islamic State group opened fire inside a gay nightclub in Florida, in the worst terror attack on US soil since September 11, 2001. / AFP PHOTO / John MACDOUGALLJOHN MACDOUGALL/AFP/Getty Images

Fast Forward: Aftermath of Orlando shooting, Trump in New England
Penguins players mobbed one another after the final horn sounded.

Penguins 3, Sharks 1

Penguins win Game 6, take Stanley Cup
The cast of

?Hamilton? dominates Tonys with 11 awards

Sports

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New England Patriots tight end Rob Gronkowski (87) catches a pass during an NFL football practice Monday, June 13, 2016, in Foxborough, Mass. (AP Photo/Michael Dwyer)

Rob Gronkowski returns to practice field

The Patriots tight end missed three on-field workouts during minicamp last week.

Metro

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Boston Mayor Marty Walsh greeted soon-to-be graduates before a ceremony at the Jeremiah Burke High School in Boston last Friday.

Walsh will increase public education spending by nearly $5m

Mayor Martin Walsh said his revised fiscal 2017 operating budget represents a total increase of $18.2 million for the School Department.

Politics

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Mayor Martin Walsh (left) stood with US Ambassador to China Max Baucus, Secretary of State John Kerry, and Chinese State Councilor Yang Jiechi at a climate summit in Beijing.

Capital Source

Kerry says he backs Mayor Walsh

In Beijing, Secretary of State John Kerry and Mayor Martin Walsh caught up on Boston gossip.

Cars Partner Content

Search This Week's Specials

The New England metros where your car was most likely to get stolen in 2015

According to statistics from the National Insurance Crime Bureau.

Nation & World

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WASHINGTON, DC - JUNE 9: Visitors leave the Supreme Court building on Capitol Hill on June 9, 2016 in Washington, D.C. Texas Attorney General Ken Paxton later announced a lawsuit against the state of Delaware over unclaimed checks. (Photo by Gabriella Demczuk/Getty Images)

Supreme Court rules against Puerto Rico in debt case

The 5-2 ruling said that federal bankruptcy law bars Puerto Rico from enacting its own law to restructure about $20 billion in debt.

Columnists

Kelvin Cobaris, a local clergyman, consoled Orlando city commissioner Patty Sheehan (right) and Terry DeCarlo, an Orlando gay-rights advocate, near the scene of the mass shooting.

Adrian Walker

Terrorist attack must spark unity, not finger-pointing
People held a vigil outside the Orlando Regional Medical Center Sunday.

MICHAEL A. COHEN

All of us must bear responsibility for Orlando

NEW YORK, NY - SEPTEMBER 19: People walk by a check cashing store in the South Bronx on September 19, 2013 in New York City. According to the 2010 U.S. Census Bureau report, over a quarter-million people in the South Bronx are living in poverty, making the 16th Congressional District the poorest in the nation. New Census Bureau numbers for all of New York City show that the poverty rate has risen to 21.2 percent in 2012, from 20.9 percent the year before. As New Yorkers prepare to vote for their next mayor following Michael Bloomberg, the Democratic candidate Bill de Blasio has focused on the theme that New York has transformed into a

JEFF JACOBY

No option for payday loans would be bad
This January 2015 booking photo released by the Santa Clara County Sheriff?s Office shows Brock Turner, the former Stanford University swimmer who was sentenced to six months in jail for sexually assaulting an unconscious woman.

DANTE RAMOS

Stanford rape uproar?s lost lesson: Call the cops
Project manager John B. Hynes IV and the Rev. James Flavin at the new site of Our Lady of Good Voyage.

Kevin Cullen

Our Lady of Good Voyage survives Seaport boom
Most of the spring high school state championships will be decided in the upcoming week.

DAN SHAUGHNESSY

Reminders for parents watching their kids? games
The tower at 171 Tremont St. would loom over Boston Common.

Yvonne Abraham

They?re alone in a changing neighborhood
Hockey fan Matt Adamowski laid flowers at a statue of Gordie Howe Friday in Saskatoon, Saskatchewan, in the NHL great?s home province.

KEVIN PAUL DUPONT | ON SECOND THOUGHT

Howe?s grace off the ice belied his ferocity on it
Jane Bergman, a delivery driver for Grubhub, left to deliver a meal from El Pelon Taqueria near Boston College.

Scott Kirsner | Innovation Economy

Food fight! Delivery apps in a battle for survival
Graduates at Jeremiah E. Burke High School celebrated their graduation on Friday.

THOMAS FARRAGHER

Resilience on display at the Burke

DANTE RAMOS

The period is dead ? but so what?

ALEX BEAM

My un-bucket list

Business

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Gun enthusiasts looked over Smith & Wesson guns at the National Rifle Association's (NRA) annual meetings and exhibits show in Louisville.

Gun maker stocks rise in wake of Orlando shooting

Shares of Smith & Wesson jumped more than 7 percent Monday in the wake of Sunday?s massacre.

Arts

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Olivier Meslay, the new director of the Clark Art Institute.

Clark Art Institute names new director

Olivier Meslay has international ties and Massachusetts connections.

Ground Game

ground game

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/06/13/BostonGlobe.com/Politics/Images/05360659.jpg What history tells us about tragedy and presidential politics

Based on past election cycles, the Orlando shooting probably won?t change the 2016 race.

Globe investigations

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/05/09/BostonGlobe.com/Metro/Images/spotlight9090-10654.jpg Private schools, painful secrets

More than 200 victims. At least 90 legal claims. At least 67 private schools in New England. This is the story of hundreds of students sexually abused by staffers, and emerging from decades of silence today.

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.

Magazine

The cover for the June 12 2016 issue

Where do Massachusetts tourists come from?
The cover for the June 5 2016 issue

Blind date: Pho sure

The cover for the May 29 2016 issue

Letters to the editor of the Globe Magazine
The cover for the May 22 2016 issue

8 tips for choosing a college

Design New England

Design New England

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2016/06/06/BostonGlobe.com/Lifestyle/Images/low_res.png ?This is home?

Keith Leblanc and Kelly Monnahan create a haven for themselves, family, and friends in the piney hills of outer Cape Cod.