Mark Duke's Girlfriend Wears a Wire

Investigators decided to have Mark Duke's girlfriend wear a wire in an attempt to get a confession from him, but at some point, the wire was turned off.

Season 1 Episode 3 - Videos

1:51

Preview

Evidence at the Duke Murder Scene Suggests Multiple Perpetrators

Now Playing

1:51

Exclusive

Mark Duke's Girlfriend Wears a Wire

1:46

Exclusive

Randy Duke Tried to Be a Father to Mark Duke

2:12

Exclusive

Did Randy Duke's Debts Play a Role in His Murder?

Trending on Oxygen

1:45

Cold Justice
Tiffani McInnis Opens Up About Her "Spunky, Goofy" Mom
1:38

Cold Justice
Abbey Abbondandolo's Cold Justice-Themed Halloween Party
2:58

Prosecuting Evil with Kelly Siegler
Adrienne Jones Caught In Deadly Love Triangle
3:07

Dateline: Secrets Uncovered
Kris Jenner Shares Details on O.J. Simpson's Relationship with Nicole Brown Simpson
2:31

Dateline: Secrets Uncovered
"Blood Everywhere": A Cut on O.J. Simpson's Hand Piques Police Interest
3:02

Cold Justice
Over 11,000 Cold Cases in L.A. Over 50 Years
1:17

Cold Justice
Your First Look at Cold Justice Season 7
2:13

Dateline: Secrets Uncovered
The Deaths of Nicole Brown Simpson and Ron Goldman
1:08

Cold Justice
Brutal, Bloody Killing Done in a Minute and a Half
2:06

Preview
Elbert Holder Calls 911, Fiancée Carla Knowlton Shot to Death
1:36

Selena and Yolanda: The Secrets Between Them
Your First Look at Selena and Yolanda: The Secrets Between Them
1:51

Snapped: Killer Couples
Killer Couples: Nick Godejohn Spent 'Magical' Days With Gypsy Rose Before The Murder
1:08

Cold Justice
"Being Pretty Is a Risk Factor": The Disappearance of Kimberly Langwell
1:24

Selena and Yolanda: The Secrets Between Them
Yolanda Saldívar on Abraham Quintanilla: “I Was More Loyal to [Selena] Than to Him”
0:46

Cold Justice
Kelly Siegler's Personal Reason to Seek Justice for Kimberly Langwell
3:00

Kill or Be Killed
Spencer Newcomer Put into Solitary Confinement After Arrest
1:19

Sin City Murders
Former Bodybuilder Speaks on Craig Titus: “He Was Vocal”
1:28

Sin City Murders
Detectives Find Pipe Bomb in Willebaldo Dorantes Antonio's Car

Mark Duke's Girlfriend Wears a Wire

Season 1 Episode 3 - Videos

Trending on Oxygen

Tiffani McInnis Opens Up About Her "Spunky, Goofy" Mom

Abbey Abbondandolo's Cold Justice-Themed Halloween Party

Adrienne Jones Caught In Deadly Love Triangle

Kris Jenner Shares Details on O.J. Simpson's Relationship with Nicole Brown Simpson

"Blood Everywhere": A Cut on O.J. Simpson's Hand Piques Police Interest

Over 11,000 Cold Cases in L.A. Over 50 Years

Your First Look at Cold Justice Season 7

The Deaths of Nicole Brown Simpson and Ron Goldman

Brutal, Bloody Killing Done in a Minute and a Half

Elbert Holder Calls 911, Fiancée Carla Knowlton Shot to Death

Your First Look at Selena and Yolanda: The Secrets Between Them

Killer Couples: Nick Godejohn Spent 'Magical' Days With Gypsy Rose Before The Murder

"Being Pretty Is a Risk Factor": The Disappearance of Kimberly Langwell

Yolanda Saldívar on Abraham Quintanilla: “I Was More Loyal to [Selena] Than to Him”

Kelly Siegler's Personal Reason to Seek Justice for Kimberly Langwell

Spencer Newcomer Put into Solitary Confinement After Arrest

Former Bodybuilder Speaks on Craig Titus: “He Was Vocal”

Detectives Find Pipe Bomb in Willebaldo Dorantes Antonio's Car