Martin Richard, 8, who was killed in the Boston Marathon bombing attacks, is shown in this undated family picture.

Brothers Andrew and James O'Connell visited a logo honoring Richard during opening day of Little League play in Savin Hill on April 27. The boy was a member of the Savin Hill Rangers.

A Little League player paused for reflection during ceremonies honoring Richard on April 27.

In honor of Richard, parents and children held a moment of silence before the start of Little League play on April 27.

Nine-year-old Nolan McKenna greeted Boston police and firefighters who lined Savin Hill Avenue in Dorchester, where a parade of Little Leaguers made their way to the field for the season's opening day on April 27. Richard was McKenna’s friend and teammate.

McKenna gave high fives to people lining the parade route.

Savin Hill Little Leaguers marched in a parade to Savin Hill Park, where Richard was honored.

This photo shows Martin displaying his sign asking for peace.

Boston Marathon runner Megan Cloke paused after leaving flowers on the doorstep of 8-year-old Martin Richard's home in Dorchester.

A chalk mural was created in Hemenway Park by Martin Richard’s friends and classmates. His school, the Neighborhood House Charter School, was nearby.

More chalk messages in Hemenway Park.

A neighbor left the Richard home.

Neighbors hugged outside the home of the Richard family.