Tsarnaev Not Expected to Take Stand, Officials Say
Tsarnaev faces death penalty, defense has painted brother as mastermind.
Mystery Deepens After Gold Bar Found From $4.9M Heist
Discovery now has the FBI confident of crime's South Florida "nexus."
Teen Describes Quick Thinking Used to Save Family From Fire
Marcus McCoy's phone call is credited with keeping his family alive.
Dozens Arrested in Los Angeles Street Racing Bust
The bust comes two months after a deadly accident.
Inside Special Ops Program That Put Woman in Afghanistan Warzones
New book "Ashley's War" focuses on a female soldier killed in combat.
5 Things to Know This Morning: It's Official!
5 Things to Know This Morning
US Couple Convicted, Sentenced in Indonesia Killing
Tommy Schaefer and Heather Mack were found guilty related to 2014 death.
Mayor 'Angry' About Man's Unexplained Death After Arrest
Police said Freddie Gray had been trying to flee from officers.
'Cannabis Cup' Draws Crowds of Marijuana Aficionados to Denver
Find out why they call it the mile-high city.
No Criminal Charges in Blaze That Killed Boston Firefighters
No criminal charges against welding company in blaze that killed 2 Boston firefighters
Cleveland Officers Want Delay in Lawsuit Over Boy's Shooting
Police officers want delay in lawsuit over Cleveland boy's shooting until criminal probe ends
Judge Considers Releasing Video of Officer-Involved Shooting
Judge considers releasing video police say shows Pennsylvania officer shooting unarmed man
Questions, Answers About Police Officers Who Confuse Weapons
Questions, answers about rare occurrences of officers who shoot handguns instead of stun guns
Jury Selected for 3 Defendants in FAMU Band Hazing Trial
Jury selected for remaining 3 defendants charged in Florida A&M band hazing case
Guidelines Call for 20-Year Sentence in CIA Leak Case
Prosecutors urge severe sentence in CIA leak case; guidelines call for 20 years
Lawyer: No Answer on Why Man Who Died in Custody Was Stopped
Lawyer of man who died after an encounter with Baltimore police suspects no cause for arrest
Suspicious Cylinders Force Evacuation of St. Louis City Hall
Suspicious cylinders force evacuation of workers, public from St. Louis City Hall
Watch: Marijuana Aficionados Unite at 'Cannabis Cup'
Fusion's Chief Cannabis Correspondent Ryan Nerz visits the world's leading cannabis trade show in Denver.
Watch: Boston Marathon Bombing Amputee Crosses Finish Line
Rebekah Gregory ran 3.2 miles on a prosthetic after losing her leg when a bomb exploded near the finish line in 2013.
Watch: Dash Cam Video Shows Dramatic Rescue of Man From Burning Car
Two Mesquite, Texas police officers broke through a window of the burning vehicle and pulled Hector Valles to safety.
Watch: Day in Pictures: 4/20/15
Images from across the globe: Saudi Arabia Defends Its Border, Refugees Await Food In Johannesburg and Lelisa Desisa of...
Watch: From Harlem to China: Author Traces Family Tree
Mystery of Grandfather's Life Revealed in "Finding Samuel Lowe"
Watch: Cleveland Kidnapper Ariel Castro Found Dead in Cell
Ariel Castro was found dead in his prison cell from an apparent suicide.
Watch: Alleged ISIS Conspirators Caught in San Diego As They Tried to Catch Flights in Mexico, Officials Say
ABC News' Marci Gonzalez has the latest on the six men from Minnesota arrested for allegedly supporting ISIS. Jared Aarons...
Watch: Knight to Castro: 'Death Penalty Would Be So Much Easier'
Ariel Castro's victim confronted him at his sentencing hearing where he was given a life sentence.
Watch: Kidnapped Cleveland Women Speak of Horror
The three women held captive for more than 10 years express gratitude for all the support they received.
Watch: Charles Ramsey on Rescue: 'Either I'm Stupid' or He's That Good
George Stephanopoulos talks to the man who helped rescue three kidnapped women.
Full Episode: Nightline 04/20/15: How Cal Harris Can Be Tried for Murder Again
Parents, Friends Grapple with Social Media Struggle of ‘Oversharenting’; King Craftmen Build One-of-Kind Cabins From Scratch
Full Episode: WN 04/20/15: Emotional Day at the Boston Marathon
Target sells out of Lilly Pulitzer; teen makes lifesaving 911 call while trapped in burning house with his sister.
Full Episode: GMA 04/20/15: Terror Arrests Put Attention on New Potential Threat
Migrant Ship Rescue Efforts Continue; John Travolta Sheds Light on his New Role in 'The Forger'
Full Episode: This Week 04/19/15: GOP Candidates Address Hillary Clinton's Campaign
Guests: Claire McCaskill, Mike McCaul, Ana Navarro, Cokie Roberts, Matt Dowd, LZ Granderson
Full Episode: 20/20 04/18/15: Black Widow
A woman accused of poisoning her second husband with antifreeze and attempting to kill her daughter.