Member of the Wack Pack Dies in jail at 39

Kallenbach contracted pneumonia while in custody on a charge of attempted child abduction. He died Thursday at Riddle Memorial Hospital near Media, his mother, Fay Kallenbach, said Friday. She said her son suffered from the chronic ailment cystic fibrosis and officials at the Delaware County jail near Philadelphia had failed to properly care for him.

Stern first reported the news on his Sirius Satellite Radio show Thursday.

Kallenbach, whose goofball antics included attempting to blow smoke from his eyes, made dozens of appearances on Stern’s show beginning in 1990.

Stern once likened him to MTV’s Beavis and Butt-head and wrote in his 1993 book “Private Parts” that Kallenbach was the “ultimate airhead.”