ID has joined forces with Dateline ... Alex? This Sunday, Investigation Discovery and velvety-voiced Dateline NBC correspondent Keith Morrison will revisit the double-homicide.

What began as a perplexing missing person’s case soon unwound into a heartbreaking murder investigation. As new details appear on the surface, Dateline ... more truths come up on the surface ...

Sherri Papini will speak out about her 2016 kidnapping for the first time in an Investigation Discovery docuseries ... when she returned," ID President Jason Sarlanis said in a press release ...