LOS ANGELES, May 8 (UPI) -- Katie Douglas and Kevin Durand say their new horror film, Clown in a Cornfield, in theaters Friday, is as much about parents and children as it is about a killer clown. Douglas stars as Quinn, the new girl in town, who learns about a killer who slaughtered partying teens in Kettle Springs, Mo., in the 1990s while dressed as Frendo the clown. Durand plays Arthur, the city's mayor who is annoyed at the modern-day teens bringing up the Frendo murders. At school, Quinn