With boy?s parents in the courtroom, a medical examiner detailed Martin Richard?s fatal injuries before the prosecution rested its case. 

A look at the witnesses, evidence, and key players in the trial of Dzhokhar Tsarnaev. 

President Obama called Officer John Moynihan a ?hero? during remarks at the Edward Kennedy Institute dedication.  

Frank DePaola, interim general manager for the MBTA, said the T could have used anti-icing fluid on its third rails. 

Nina Obukhov, 34, shot her daughters, Katherine, 8, and Elizabeth, 6, and then likely turned the gun on herself, authorities said. 

Police opened fire after a car tried to ram the gate at the NSA?s headquarters in Fort Meade, Md. 

Joanna Leigh, 41, is accused of lying about suffering a traumatic brain injury during the 2013 Marathon bombings. 

The law set off a firestorm, with some saying it would allow businesses to deny service to gay consumers based on their religious beliefs.