求翻译：　　6、把核桃交给FBI等部门，他们会想尽各种办法让核桃开口。当然，他们也可能通知你说核桃在协助调查时因突发心脏病死亡，并拒绝将尸体交还，声称早已将其火化。是什么意思？

　　6, walnut to the FBI and other departments, they will try various opening of walnut. Of course, they may also inform you that Walnut died of sudden heart attack at the time of investigation, and refused to return the corpse, claims to already be cremated.