What is your basis for disagreement here? OP pointed to something which literally uses the word "decapitation" what leads you to believe that it's an erroneous use?

Having seen the picture, I can assure you it wasn't decapitation. I can also say I regretted looking at it, and strongly advise against it.

Because the article quotes someone who has a misunderstanding of the word "decapitation":

> “I was playing at the park and we came into the clearing and we just saw a body on the floor,” said Maria Delgado, 13. “He was just decapitated — the whole top of his head was gone,”