Family, friends mourn MIT officer

Collier, 27, was attacked in Cambridge in what Boston Police Commissioner Edward Davis has called a “vicious assassination.’’

The motorcade arrived at St. Patrick's Church in Stoneham for Sean Collier's funeral.

Bill Greene/Globe Staff

The motorcade arrived at St. Patrick's Church in Stoneham for Sean Collier's funeral.

Collier's family waited outside the church before the service.

Bill Greene/Globe Staff

Collier's family waited outside the church before the service.

Members of the Somerville Police waited to enter the church.

Bill Greene/Globe Staff

Members of the Somerville Police waited to enter the church.

Since his death, Collier’s family and friends have described a man who had helped others since his childhood years in Wilmington.

Bill Greene/Globe Staff

Since his death, Collier’s family and friends have described a man who had helped others since his childhood years in Wilmington.

Heather Tighe of Woburn and her son, Brendan, showed their appreciation and support outside the service.

Bill Greene/Globe Staff

Heather Tighe of Woburn and her son, Brendan, showed their appreciation and support outside the service.

Sean Collier was second youngest of six children and his family’s moral compass. Clockwise from lower left, siblings Andrew Collier, Nicole Lynch, Sean Collier, Jennifer Lemmerman, Jenn Rogers, and Rob Rogers posed for a family photo.

Kevin Cullen

MIT officer always looked out for others

The siblings of Sean Collier want people to know about the 27-year-old who was a loyal brother, a dutiful son, and a doting uncle.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2013/04/23/BostonGlobe.com/Metro/Images/slider_silence9--90x90.jpg Copley Square area reopening in stages today

Access will be limited to businesses and residents, and no time has been set to reopen the neighborhood to the general public.

People on Boylston Street paused for a moment of quiet tribute and reflection exactly one week after the Marathon bombings.

Only two patients remain in critical condition

The count of injured people from the Marathon bombings who were treated in area hospitals has jumped sharply to 282.

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2013/04/23/BostonGlobe.com/Metro/Images/suspect-5721.jpg Suspect charged with using weapon of mass destruction

The prosecution of Dzhokhar Tsarnaev could put the Marathon bombing suspect in prison for life or send him to the death chamber.

Graphic

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2013/04/23/BostonGlobe.com/Special/Advance/Images/time585-076--90x90.jpg Bomb placement timeline

The FBI alleges Tamerlan and Dzhokhar Tsarnaev were observed Marathon Monday in the Boylston Street area, and that Dzhokhar planted the second bomb in front of the Forum restaurant.

Special section

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2013/04/21/BostonGlobe.com/Metro/Images/9f7685a6ecaf441a8df0c53ec2144d9e-9f7685a6ecaf441a8df0c53ec2144d9e-0-5400--90x90.jpg Full coverage: Marathon bombings

Coverage of the two blasts that shook that shook the city, killing 3 and injuring at least 140.

Opinion on the bombings

Arts

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FRAME BY FRAME

Small token of a Roman’s murderous ambitions

A coin issued by Marcus Junius Brutus, the most famous of Julius Caesar’s assassins, is the star in a new MFA gallery.

Globe Insiders

Editorial Event | April 17

//c.o0bg.com/rf/image_90x90/Boston/Production/BostonGlobe.com/WebPages/Specials/Insiders/Content/Photos/Dina_Rudick_headshot2011.JPG Editorial Event: Video tips with Dina Rudick

Attend a session on photography and videography with the host of BostonGlobe.com’s “Back Story” series.