The sheriff does not believe Carol and Mike about the giant spider, but their science teacher, Mr. Kingman, persuades him to return to the cave with large amounts of DDT. They find Jack's body, drained of fluids, and spray DDT throughout the cavern to flush out and then kill the spider. The apparently lifeless body of the spider is taken back to town to the high school gym, where Kingman wants to study it, concerned that whatever conditions created it may produce a whole race of giant spiders.
The sheriff does not trust Carol and Mike's account of the enormous spider, but their science teacher, Mr. Kingman, convinces him to return to the cave with substantial quantities of DDT. They discover Jack's body, devoid of fluids, and spray DDT throughout the cavern to eliminate and then kill the spider. The apparently lifeless body of the spider is brought back to town to the high school gym, where Kingman wishes to study it, worried that whatever conditions created it may produce an entire species of giant spiders.