He was abducted by Crypto and Pox five years before the events of Path of the Furon. However, his mind wipe implant failed and he kept in contact with a friend in the military, reporting even the slightest sign of alien activity using the world's most powerful citizen band radio. He is paranoid since his abduction and keeps himself locked up in his hillside trailer.
After discovering the implant's failure, Crypto and Pox trick him into coming out of his home. He tries to flee in his pickup and calls his friends who show up in attack helicopters. Crypto destroys all of them and jams Skeever's radio signal, then he brainwashes him into believing that alien invaders do not exist.