I never bought the idea that a housekeeper in the same house would have to call an outsider to come smash a window and enter the bedroom. She herself could have just gone and peeped in the window and maybe knocked on it. Interior door locks in that era were openable with simple skeleton keys, and a housekeeper would have had house keys. And there was no reason to have sliding bolts on a bedroom door. And if Monroe was murdered by one or more operatives, how would a resident housekeeper not know someone entered the house? But I also don't buy that the Kennedys were into murder.