NEW: A Mississippi mother spent 172 days searching for her adult son, only to learn that he’d been dead all along.
An off-duty officer had run him over less than an hour after he left the house.
Authorities then buried him without notifying his family.
https://www.nbcnews.com/news/us-news/bettersten-wade-dexter-jackson-mississippi-police-missing-rcna121697