Casey Kasem -- Lawsuit Over Who Gets HUGE Life Insurance Check

The dogfight over Casey Kasem's estate is now going to court -- his kids are waging war with his widow over a $2 million life insurance policy.

MetLife actually filed the lawsuit ... telling the judge it's stumped. Both Jean Kasem and Casey's 3 kids have laid claim to the loot and the insurance company doesn't want to make the wrong decision and then have to pay out twice. So MetLife wants a judge to decide who gets the money.

Casey's kids hired a lawyer who fired off a letter to MetLife saying Jean essentially killed Casey by neglecting his care, which resulted in fatal bedsores and dehydration. The kids say someone who causes someone else's death can't inherit their money.

Casey's kids said when he was alive that the feud was not about money. It's always about money, right?