The answers themselves are not always obvious to the average layperson, but to many UFOlogists it becomes a tedious series of questioning, knowledge and skill, and patience within the investigative process. It also helps to have the right tools and a reliable laboratory backing you up for sample analysis in cases that appear to be good candidates for UFO involvement.
Some investigations never get that far.
A good example to learn from is the recent mutilation case of a horse in Clint, Texas that occurred on February 21, 2000. For the sake of privacy we ll call the horse owners Doug and Beth , per their request. The horse had been treated with mineral oil, given orally, and had been feeling better that whole day before the mutilation occurred. When she went to the back of the property where the horse stalls were located she found that the horse in question had been relocated outside the fence, the other horses all moved from their areas but still were within the fence, part of the fence moved from it s place, and the mare s head hung over the fence gate. The horse was breathing very heavy and in shock .