How do you lose a human being's remains?

"Fulton County Medical Examiner's Office shipped the remains to a specialized facility to determine a cause of death for Jeffrey Merriweather Jr., who was found dead and partially decomposing in 2019. Merriweather's remains have since been lost in transit, leaving his family members in the dark as to how he died.
Merriweather was 32 years old when he died."

https://www.msn.com/en-us/news..../crime/fedex-respond