Investigation Discovery continues its heritage of providing in-depth  compelling documentaries & shows.

Investigation Discovery

Some people suffer from powerful delusions that lead to irrational and often self-destructive behavior; when reality and fantasy collide, pointing out the truth can be disastrous.

The Deadly Type With Candice DeLong

The Deluded

Candice demonstrates there's a thin line between devotion and delusion when it comes to love; she identifies the warning signs and discovers the sad truth behind too much passion and its power to destroy loved ones.

The Obsessive

Candice reveals what happens when empathy is turned into a weapon and the danger behind "crocodile tears."

The Faker

Candice arms viewers with the information needed to decide if someone wants them or their money; greedy partners can pull off some daring "robberies" right under their victims' noses.

The Gold Digger

Candice examines narcissism; removed from the norms of community obligations, narcissists run their own selfish agenda which can prove deadly to anyone in their way.

The Narcissist

For some, social media is an all-consuming addiction -- a constant craving for affirmation that can lead to insecurity and isolation; Candice examines cases in which online interactions have led to lethal real-word consequences.

The Oversharer

Candice reveals how human predators can be deadlier than those in the wild.

The Predator

Candice explores how certain circumstances, including emotional stress, financial hardship, drugs, and alcohol, can unlock the killer within a person.

The Transformer

Candice analyzes three master manipulators, and she uncovers the red flags that can lead to tragedy.

The Controller

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Candice DeLong investigates the personality traits that have triggered homicides, going inside the hunt for a killer as detectives race to build a psychological profile of the killer amid a growing chorus of suspects.

S1 E5 | The Narcissist