Why Infidelity Turns Deadly: The Psychology Behind Relationship Homicides

Why do some affairs end in heartbreak while others end in tragedy?

In this powerful episode of Inside the Polygraph, David Goldberg examines one of the most disturbing questions in criminal investigations: Why does infidelity sometimes lead to murder?

Drawing from decades of experience in law enforcement, criminal investigations, and more than 25 years as a board-certified polygraph examiner, David explores the psychological and behavioral patterns that can transform betrayal into deadly violence. This is not a sensationalized true crime episode—it's an educational discussion designed to help listeners recognize dangerous warning signs before it's too late.

Throughout the episode, David explains how emotions such as jealousy, fear of rejection, humiliation, financial loss, obsessive control, and narcissistic entitlement can escalate into violence when left unchecked. He also breaks down several well-known criminal cases to illustrate the behavioral patterns investigators often encounter.

Most importantly, David discusses the red flags that may indicate a relationship is becoming emotionally or physically dangerous and why seeking help early can save lives.

In This Episode:

• Why some acts of infidelity escalate into homicide
• The psychology behind jealousy, obsession, and coercive control
• Warning signs of emotionally abusive and controlling relationships
• How fear, humiliation, and loss influence violent behavior
• The role of narcissistic entitlement in domestic violence
• Why investigators almost always examine the intimate partner first
• Lessons from high-profile criminal cases, including:
   
  • Chris Watts
•  
  • Fotis Dulos
•  
  • Lawrence Rudolph
•  
  • Chacey Poynter
•  
  • Patrick Frazee
•  
• A real case from David's own career involving a woman who passed her polygraph—and was tragically murdered days later
• Why slowing down in relationships and asking difficult questions early may help prevent future tragedy

Disclaimer: This episode is intended for educational purposes only. David Goldberg is not a psychologist or psychiatrist and does not provide mental health or legal advice. If you or someone you know is experiencing domestic violence, abuse, or feels unsafe, seek immediate assistance by calling 911, contacting your local emergency services, or reaching out to a qualified domestic violence organization or mental health professional.

If this episode helps you better understand the warning signs of unhealthy relationships, please Like, Subscribe, and Comment. Your support helps us continue educating the public on investigations, human behavior, and the pursuit of truth.

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