Ep 1. Diane Zamora and David Graham

In Killer Couples season 5 episode 1, viewers are taken on a chilling journey through the relationship of Diane Zamora and David Graham - a young couple whose love was tainted by a deadly obsession.

On the surface, Diane and David seemed like the perfect pair. Both were high-achieving students at the United States Naval Academy, with bright futures ahead of them. But behind closed doors, their relationship was toxic and possessive, fueled by an obsessive need for control and dominance.

The episode begins by introducing viewers to Diane and David's backgrounds - their families, their upbringing, and how they found themselves at the Naval Academy. Despite coming from different parts of the country and having different backgrounds, they both shared a fierce ambition and determination to succeed.

As their relationship developed, it became clear that Diane was the more dominant partner. She was controlling and manipulative, constantly demanding David's attention and loyalty. David, meanwhile, was more passive and submissive, often going along with Diane's plans even when he didn't want to.

Things took a dark turn when Diane became convinced that David was cheating on her with another female student at the Academy. Despite David's repeated denials, Diane was consumed with jealousy and rage. She concocted a plan to confront the other woman and force her to confess to the alleged affair, but things quickly spiraled out of control.

On December 4, 1995, the body of Adrienne Jones was found by the side of a road in Texas. She had been shot multiple times and left for dead. Police quickly identified her as the woman Diane believed was having an affair with David.

What followed was a web of lies, cover-ups, and betrayals that would ultimately lead to Diane and David's downfall. The episode examines the investigation into Adrienne's murder, including the evidence that pointed to Diane and David as the culprits.

As the trial approaches, viewers are given insight into the minds of Diane and David as they prepare to face justice. They both maintain their innocence, but the evidence against them is overwhelming. In the end, they are each found guilty - David of murder and Diane of capital murder.

The episode concludes with a look at the aftermath of the case. Both Diane and David are currently serving life sentences in prison, and their families were left to deal with the aftermath of the tragedy. The case remains one of the most notorious examples of obsession and violence in recent history.

Overall, Killer Couples season 5 episode 1 offers a shocking look at the dark side of love and the devastating consequences that can arise when obsession takes over. With gripping interviews and expert analysis, it is a must-watch for true crime fans and anyone interested in the psychology of relationships gone awry.