Evidence mounts of radical turn for bomber

Photos of violence victims Sean Collier, Krystle Campbell, Martin Richard, and Lingzi Lu were on view at the Cathedral of the Holy Cross Sunday.

MARIO TAMA/GETTY IMAGES

Photos of violence victims Sean Collier, Krystle Campbell, Martin Richard, and Lingzi Lu were on view at the Cathedral of the Holy Cross Sunday.

Candles were lit for those who died in the Marathon bombings and the subsequent manhunt at a Boylston Street memorial.

BRIAN SNYDER/Reuters

Candles were lit for those who died in the Marathon bombings and the subsequent manhunt at a Boylston Street memorial.

The memorial to the bombing victims was moved from the intersection of Boylston and Berkeley streets to the adjacent sidewalk on Sunday. The collection will be moved again to Copley Square soon.

Dina Rudick/Globe Staff

The memorial to the bombing victims was moved from the intersection of Boylston and Berkeley streets to the adjacent sidewalk on Sunday. The collection will be moved again to Copley Square soon.

Fursey Keleghan of Melrose photographed the memorial. He had brought his two girls to the site to show them the scene.

Dina Rudick/Globe Staff

Fursey Keleghan of Melrose photographed the memorial. He had brought his two girls to the site to show them the scene.

Fans sang along with

Matthew J. Lee/Globe Staff

Fans sang along with "Sweet Caroline" during the seventh inning in Sunday afternoon's Red Sox game.

Christine Hepler and her daughter Rose attended a memorial service at Boylston and Berkeley streets.

Bill Greene/Globe Staff

Christine Hepler and her daughter Rose attended a memorial service at Boylston and Berkeley streets.

Two-year-old Wesley Brillant of Natick knelt in front of a memorial near the scene of the blasts on Boylston Street.

JIM BOURG/Reuters

Two-year-old Wesley Brillant of Natick knelt in front of a memorial near the scene of the blasts on Boylston Street.

An unidentified mourner showed a program containing pictures of Krystle Campbell at her wake in Medford.

MICHAEL REYNOLDS/EPA

An unidentified mourner showed a program containing pictures of Krystle Campbell at her wake in Medford.

Unidentified men placed an American flag on their motorcycles outside Campbell's wake.

MICHAEL REYNOLDS

Unidentified men placed an American flag on their motorcycles outside Campbell's wake.

Investigators walked the route of the Boston Marathon on Boylston Street looking for evidence.

Kevork Djansezian/Getty Images

Investigators walked the route of the Boston Marathon on Boylston Street looking for evidence.

People held an American flag during a candelight vigil in Boston for the victims of the Marathon attack.

Kevork Djansezian/Getty Images

People held an American flag during a candelight vigil in Boston for the victims of the Marathon attack.

John Dalone of Stoneham, a BAA volunteer, came to pay his respects to bombing victim Krystle Campbell.

Dina Rudick/Globe Staff

John Dalone of Stoneham, a BAA volunteer, came to pay his respects to bombing victim Krystle Campbell.

Countless mourners made a line that wrapped around the block as they waited to enter Dello Russo Funeral Home in Medford for Campbell's wake.

Dina Rudick/Globe Staff

Countless mourners made a line that wrapped around the block as they waited to enter Dello Russo Funeral Home in Medford for Campbell's wake.

Looking for evidence in last Monday’s bombings, law enforcement investigators walked the route of the Boston Marathon on Boylston Street Sunday.

Older brother broke angrily with Muslim speakers

A picture has emerged of Tamerlan Tsarnaev, one of the brothers accused of bombing the Boston Marathon, as an increasingly militant immigrant.

Thorny US legal questions swirl in case of suspect

Specialists say the case against Marathon bombing suspect Dzhokhar Tsarnaev would involve a number of emotionally charged decisions.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2013/04/22/BostonGlobe.com/Metro/Images/church-5624--90x90.jpg Clergy, congregants give solace to shaken

At churches most directly affected by the bombings and their aftermath, congregants mourned and comforted one another.

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Opinion on the bombings

Innovation Economy

Amid chaos, hospital staffers raised the bar

We owe tremendous gratitude to all those workers who show up at our city’s hospitals on normal days and the rest.

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Chelation,usually administered through an intravenous drip, uses chemicals that bind to metals such as lead, zinc, iron, aluminum, and copper inside the body and flush them out.

Unexpected results in study of chelation

A big study of the controversial therapy showed positive results in treating heart disease, but many have dismissed the findings.