You’re wrong about that. Coyotes know a dead coyote and they know exactly how it got dead. No doubt about it.
There was a fence corner on a sheep ranch where I used to snare coyotes for the rancher. Laying close to the crawl with the snare were at least 30 coyotes in all conditions from fresh to skeleton and the action never slowed down. They cared not for their fallen comrades.
Around here the other yotes would have him eaten down in 2 days. As far as buzzards eating him they’ve long since left that area for warmer climate. State trappers used to always hang yotes on the fence so the land owner could see how many he had taken.