Susan Powell is a missing woman from West Valley City, Utah, United States of America who was last seen alive on December 6, 2009.
On December 14, 2009, her husband Joshua "Josh" Powell was named a person of interest in the investigation, but he was never charged. On February 5, 2012, Josh Powell killed himself and the couple's two young sons, Charles Joshua Powell and Braden Timothy Powell in a murder–suicide after custody of the boys had been awarded to Susan Cox Powell's parents Charles and Judy Cox.
Many people argued that Josh's brother or father had killed her inspite of evidence that Josh was guilty. Susan is still missing and the investigation has been closed.
https://www.theguardian.com/world/2012/feb/06/josh-powell-blows-up-children