From The Perry Mason TV Show Book
Ed Davenport accuses his wife, Myrna, of poisoning him. He also claims to have written a letter to be opened after his death, that says that Myrna poisoned him. Myrna consults Perry, but when they learn that Davenport is at a motel, dying of arsenic poisoning, Perry works fast to cover for Myrna. When Tragg arrives to investigate Davenport’s death, the incriminating letter is out of sight—but so is Davenport’s body. Perry must buy time until he can prove Myrna’s innocence. Burger goes after Perry for tampering with evidence, but loses as usual.