
Investigators use an unlikely clue to bring young mom's killer to justice
CBSN
This story originally aired on Dec. 10, 2022. It was updated on July 29, 2023.
On Oct. 15, 2019, Joseph Elledge walked into the Columbia, Missouri Police Department without a lawyer to tell detectives about the mysterious disappearance of his 28-year-old wife, Mengqi Ji — six days earlier.
JOE ELLEDGE (police interview): We didn't have any big fights ... I think the last big fight was actually the week before. And it wasn't really a big fight.

In the past year, over 135 million passengers traveled to the U.S. from other countries. To infectious disease experts, that represents 135 million chances for an outbreak to begin. To identify and stop the next potential pandemic, government disease detectives have been discreetly searching for viral pathogens in wastewater from airplanes. Experts are worried that these efforts may not be enough.