Simplify the following text for a Grade 9 native English-speaking person.
Original: In 1970 , examinations performed on the relics suggested that the young man had been knifed in the back whilst riding his horse and had then been dragged along the ground by the terrified animal with his foot caught in a stirrup .
Simplified: In 1970 , examinations performed on the relics suggested that the young man had died in the same manner as Edward .