Dateline: The Night of the New Moon opens up one of California's most twisted murder plots, taking viewers through the calculated attempt on Greg Mulvihill's life.

The Night of the New Moon follows one of the more shocking cases of a bitter custody battle turning into a murder-for-hire plot.

Fashion designer Jacques Azagury reveals how Princess Diana challenged royal protocol through fashion choices like wearing black and revealing silhouettes, influencing royal style today.

A large trove of the princess’ belongings including her Lady Dior handbag, will be auctioned this week. For some buyers, more intimate items are the main draw.

Princess Diana's 'Caring Dress' sold for $520K, her Lady Dior handbag for $325K. See what else people bought from the late royal's largest wardrobe auction. “Princess Diana’s Style & A Royal ...

In a new documentary, Princess Diana's wedding dress designers reveal the codename she went by during the process of making the bridal gown, just one way they kept the garment top secret.

A Princess Diana memorabilia collector fell to the floor after clinching Princess Diana's iconic "Caring Dress" at a sale in Los Angeles. See PEOPLE's exclusive video.

Princess Diana's 'caring' dress sells for over $500K at auction The auction included many staple items in the late princess's famous wardrobe.

Princess Diana ’s brother, Charles Spencer, shared a rare photo of the late royal in honor of what would have been her 63rd birthday.

Princess Diana's Gowns Are Expected to Go for Millions in Largest Auction Ever of Her Wardrobe One dress, in particular, has caught the eye of collectors around the world.

Diana and Charles, William and Kate, or Harry and Meghan: Which Royal Couple Had the Most Expensive Wedding? We break down the price tag associated with each of these high-profile celebrations.