At a very early age—as young as five—Jesperson would capture and torture animals. He enjoyed watching animals kill each other as well as the feeling he got from taking their lives. This continued as he got older. He would capture birds and stray cats and dogs around the trailer park where he lived with his family, severely beating the animals and then strangling them to death, something for which he claims his father was proud of him. In the years following, Jesperson said he often thought about what it would be like to do the same to a human.