I suppose they were not the ones that killed the deer.
It was visited for many butterflies, other than S. cybele, like Lethe anthedon, Polygonia comma, Feniseca tarquinius...
Acholla multispinosa caught a honey bee, Millichiids are present on the assassin bug and honeybee. A german yellowjacket (1) decapitates the honeybee and steals the abdomen and departs. A second german yellowjacket (2) steals the thorax and moves away. The assassin bug is left with a leg.
I identified this as acholla multispinosa because it is present in all pictures and will upload how the yellowjackets are different separately.