What Police Say Happened in Murdered UNC Student's Final Moments
Faith Hedgepeth was found bludgeoned to death in her apartment in 2012.
Undercover Agent Confronts Slain Professor's Ex-Mother-In-Law
Dan Markel was killed on the morning of July 18, 2014, at his home.
Professor's Ex-Boyfriend Says Her Brother Discussed Killing Ex-Husband
Dan Markel was killed on the morning of July 18, 2014, at his home.
How Cops Caught Suspected Hit Men in FSU Professor Murder
Police tracked down the suspects with the Toyota Prius they rented.
Interactive Video and Resources for Alcohol Addiction, Recovery and Support
On the ABC News app? Click HERE to watch this interactive video. INTERACTIVE VIDEO: How Much Do You Know About Alcohol...
Elizabeth Vargas on Her Long Battle With Alcohol, Her Recovery
ABC News anchor shared her story with Diane Sawyer and in her new memoir.
Battling Anxiety, Alcohol: How Meditation, Reaching Out Saves Me
ABC News' Elizabeth Vargas shares her story in her own words
Book Excerpt: Elizabeth Vargas' 'Between Breaths'
An excerpt of ABC News "20/20" anchor's memoir, out in September.
Judge Declares Mistrial in Slain Colorado Escort Mom Case
Paige Birgfeld disappeared in 2007 and her body was found five years later.
Memory of ISIS Hostage Kayla Mueller Lives on in New Playground
Mueller was an American aid worker who was captured by ISIS in 2013.
ISIS Hostage Family Says Obama Broke Promise for Charity Donation
Parents of Kayla Mueller say president offered contribution but never delivered.
Kayla Mueller Defended Christian Faith to ISIS Executioner 'Jihadi John'
Fellow hostages described the Arizona native's strength, selflessness.
ISIS Hostage Kayla Mueller's Heartbreaking Proof of Life Video
"It's very terrifying here," American ISIS hostage says in the video.
Doctors Without Borders Refused to Help American ISIS Hostage Kayla Mueller
Arizona woman dedicated her life to helping others around the world.
Who Was Kayla Mueller, American ISIS Hostage?
Arizona woman had dedicated her life to helping others around the world.
TIMELINE: Kayla Mueller in ISIS Captivity
Arizona woman traveled halfway around the world to help refugees.
Doctors Without Borders Statement on ABC News '20/20' Kayla Mueller Report
Doctors Without Borders statement on ABC News '20/20' Kayla Mueller report.
When 'View' Co-Hosts' Personal Lives Became 'Hot Topics'
Current and former “View” co-hosts shared memories from their time on "The View"
'The View' Co-Hosts Recall the Show's Fiery, Walk-Off Moments
One of the most heated moments came in a debate over the Iraq War.
Elizabeth Vargas' Biography
Elizabeth Vargas is the co-anchor of ABC News "20/20."
David Muir
Weekend Anchor, "World News with David Muir" Co-Anchor, "20/20"
Friends, Family Stunned to Learn UNC Student Is Dead: Part 1
Faith Hedgepeth was supposed to be the first person in the Hedgepeth family to graduate from college.
UNC Student Found Bludgeoned to Death in Her Own Apartment: Part 2
Police say the murder weapon was an empty bottle of rum found in Faith Hedgepeth's apartment.
FBI Develops Profile of Murdered UNC Student's Killer: Part 3
The FBI's behavioral analysis unit tells Chapel Hill police they believe the killer knew Faith Hedgepeth.
Voicemail Found Left by UNC Student's Phone on Night of Her Murder: Part 4
Police say the voicemail was left while Faith Hedgepeth and her friends were at the Thrill nightclub.
DNA May Help Find the Identity of Who Killed Faith Hedgepeth: Part 5
Chapel Hill police sent DNA found at the crime scene to Parabon NanoLabs to come up with a composite of the killer.
Police Remain Confident They Will Find Faith Hedgepeth's Killer: Part 6
Each year, Faith Hedgepeth's family holds a fundraiser and gives away two scholarships in her memory.
20/20 09/09/16: The Elizabeth Vargas Interview
Elizabeth Vargas Grapples with Anxiety; Elizabeth Vargas 'Was So Deluded and in Denial'; Elizabeth Vargas Finds Hope and...
20/20 06/12/16: Nightclub Massacre: Terror in Orlando
Orlando Nightclub Massacre: A Timeline of What Happened; Orlando Nightclub Massacre: A Violent Attack on Prideful Community;...
20/20 06/07/16: Bobby Brown: Every Little Step Special Edition
Bobby Brown on Forming New Edition, Then Solo Career; What Led to Bobby Brown, Whitney Houston's Divorce; Bobby Brown on...
20/20 04/29/16: A Father's Story
Scientology Leader David Miscavige's Father on Son's Childhood; Ron Miscavige Says Son Changed After Joining Scientology.
'The View': 20 Years in the Making
Look back at 'The View' through the years as the show launches its 20th season.