ABC news reporting today that they were carrying a body bag. NOT A COFFIN.
The main evidence that the coffin wasn't involved is that the aircraft impacted flat ie parallel with the ground.
You don't know what you're talking about. The "flat" attitude indicates the aircraft was either stalled, or had lost its wings.
Given the reports of the distance between the wings and the fuselage, plus the appearance of the wings, it would strongly appear that the wings had separated from the aircraft.
The "flat" attitude just happened to be the attitude at the time of impact with the ground. Prior to that, the body would have been tumbling.