Denise Richard works as a librarian at the Neighborhood House Charter School, where Martin was a third-grader and Jane attends first grade. Counselors were being made available to staff and students.
"I just can't get a handle on it," family friend Jack Cunningham said of the boy's death. "In an instant, life changes."
KRYSTLE CAMPBELL: CHEERING ON FRIENDS
Krystle Campbell was a 29-year-old restaurant manager from Medford. Her father, 56-year-old William Campbell, described her as "just a very caring, very loving person, and was daddy's little girl."
Campbell had gone to the race with her best friend Karen, whose boyfriend was running in the race, her father said.
"They wanted to take a photograph of him crossing the finish line, but the explosion went off and they were right there," he said. "It's pretty devastating.
The friend suffered a severe leg injury.
Krystle's grandmother told multiple media outlets that the family was initially told Campbell was alive because of a name mix-up.
When her father arrived at Massachusetts General Hospital, however, he learned that his daughter had died.
Krystle's grandmother, Lillian Campbell, said somewhere on the way to the hospital, their names got mixed up.
Lillian Campbell said her son was "devastated" when he found out the truth and almost passed out.
JEFF BAUMAN JR.: LOST BOTH LEGS
Jeff Bauman Jr., a man pictured in an Associated Press photo from immediately after the blast, lost both his legs as he cheered his girlfriend on in the race. He survived the trauma after people rushed him away from the explosion site in a wheelchair.
Rescuers took the 27-year-old victim to Boston Medical Center, but doctors had to amputate his legs because of extensive vascular and bone damage, a Facebook post from his father said Tuesday.