(NBC News) – Tonight on “Dateline,” in the double murder case of Nichole Payne and her son Taylor, a second investigation leads to an unexpected new arrest.

After the two are found dead in their home, it takes nearly a decade to unravel what happened.

For the first time on television, Nichole’s children Remington and Jackson share what they saw the day their mother and brother were murdered.

 Andrea Canning revisits her reporting. Here’s a preview:

The white dove. A symbol of peace and love.

One woman was so moved by their grace and beauty she turned her passion for doves into a business releasing them at weddings and funerals.

Nichole Payne brought both joy and comfort to countless families.

REMINGTON: WHEN I SEE PICTURES AND WHEN I HEAR STORIES OF MY MOM, SHE’S JUST THIS WONDERFUL PERSON. THIS HAD, LIKE, THIS HUGE SMILE ALL THE TIME, GREAT PERSONALITY.

But on a December morning in 2007, Nichole’s doves made their most poignant flight of all, at her own funeral.

Now, 14 years later, two of Nichole’s children, Jackson and Remington Payne, are telling their story publicly for the first time.

JACKSON: I JUST WANTED TO BE ABLE TO PUT MY TWO CENTS IN. AND, YOU KNOW, ALL STORIES HAVE TWO SIDES.

REMINGTON: PEOPLE DON’T KNOW THAT THERE WAS SOMEBODY WHO SAW EVERYTHING THAT HAPPENED, I SAW IT HAPPEN, AND I WANT PEOPLE TO KNOW IT HAPPENED.

Watch “Dateline” Friday’s “House of Horrors” tonight at 10 p.m. on NBC4.

About “Dateline”

“Dateline NBC” is the longest-running series in NBC primetime history and is in its 30th season. Dateline is anchored by Lester Holt and features correspondents Andrea Canning, Josh Mankiewicz, Natalie Morales, Keith Morrison and Dennis Murphy.

Dateline is the #1 Friday newsmagazine and reaches more than 17 million people every week through its broadcast, and millions more through its social media platforms and podcasts.

The stories range from compelling mysteries to powerful documentaries and in-depth investigations. When major news breaks, they go to the scene, putting the pieces together to bring the viewer the full picture. And in every story they tell, they help the real people who lived the events share their journeys with the viewer.

This past season, Dateline debuted two new podcasts, “Mommy Doomsday” and “Killer Role,” hosted by correspondent Keith Morrison.

In February, NBC also greenlit a straight-to-series inspired by the story featured in the Dateline podcast series, “The Thing About Pam.” Two-time Oscar-winning actress Renee Zellweger will star and executive produce the series, in collaboration with Blumhouse Television, NBC News Studios and Zellweger’s Big Picture Co.