In ufology what close encounter involves the death of human being or other animal during a witness encounter?

In ufology, a "Close Encounter of the Third Kind" refers to incidents where a person or animal experiences direct interaction with extraterrestrial beings, which can sometimes result in injury or death. This classification is part of a broader system introduced by astronomer J. Allen Hynek, which categorizes encounters based on the level of interaction. While such cases are rare and often controversial, they are significant in discussions about the potential dangers associated with UFO sightings and alien encounters.