"For several days before the murder Jackson would sit about our room and read a medical dictionary to try and learn all about the effect of poisons. He finally selected cocaine as the most suitable for his purpose. At last he took four grains of cocaine and put in sixteen drops of water. He told me that he was going to give the cocaine solution to Pearl and make her drink it, and that it would kill the vocal powers. She would be unable to scream or talk and then he was going to cut her head off."
"Do you think he did that?"
"Yes, I am almost sure that was the way he killed her."
"I don't know how he gave her the poison, but think she took it before getting into the cab, so that it would have its full effect by the time she was driven over to Ft. Thomas."
"Well, what became of the head? You know where it is."
"I do not. If I did I would tell."
Jackson was then sent for. He appeared to be worried, and when Mayor Caldwell asked him if he had bought any cocaine he said:
"Yes, I bought some cocaine."
"When?"
"Last Wednesday night."