As Casey Kasem’s corpse festers in Norway five months after his tragic death, a detective hired by his children has slammed his widow in an exclusive interview with The National ENQUIRER.

“I don’t think Jean Kasem cares one iota for him – living or dead,” investigator Logan Clarke told The ENQUIRER. “It is as if all this woman cares about is keeping his body from his children.”

In exclusive documents obtained by The ENQUIRER dated Nov. 7, the family states that Casey’s body was in an “un-embalmed state.” The corpse “continued to decompose as Jean Kasem kept the body unrefrigerated.” No information from an autopsy “could be gained” as a result.

Working for Casey’s distraught daughter Kerri, Clarke confided, “We’re appealing to the Los Angeles Police Department to intervene. His kids want his body back home so he can be buried at Forest Lawn cemetery.”

Jean, a former “Cheers” actress, who has legal rights over Casey’s remains, had his body transported to Oslo, Norway, which Kerri claimed was an attempt to stonewall an “elder abuse” investigation.

In a bizarre claim, Jean – who grew up in New Hampshire before living in a Beverly Hills mansion bought by her husband – said she did it because of her Norwegian heritage!

Casey died June 15, age 82, in a Gig Harbor, Wash. hospital amid a bitter family feud.