The Happy Homicide

It's not so bad, being on trial for murder. Of course, it's a little embarrassing—when the principal witness is the corpse!
Attendants pushing an ambulance cot wheeled what was left of murdered Fannie Bork into the center of the courtroom. The body was covered with a white sheet, except for the long, slim feet which were sticking out. Her toenails were painted red.
Forty-year-old John Bork listened while the prosecutor read the indictment against him: —and the same John Bork did on the twelfth day of March, 1986, fire a pistol at his wife, having then and there a long preconceived desire to kill her, and then and there did achieve his felonious intent, and did murder the same Fannie Bork.
John Bork, you have heard the indictment, stated the judge formally. How do you wish to plead: Not guilty, no contest, or wait and see?
I'll wait and see, your honor.
I thought you would, sighed the judge. We haven't had a straight not-guilty plea in ages. Proceed, Mr. Prosecutor.
Roll in the Very Complicated Monstrous Proximilator machine, commanded the prosecutor. Two burly laborers, panting, rolled the machine on its creaky casters across the court room floor to Fannie's head. The machine was six feet tall, three feet wide, and twelve inches deep; on its face were forty-three meters and an on/off switch.
The laborers plugged the machine's line cord into an outlet and got out of the way.
The prosecutor flipped the switch from off to on. Then he folded his arms and waited until all the forty-three meters ceased their dancing and went back to zero. That done, he turned to the jury.
In this machine rests the proof of the crime charged against the defendant, he said dramatically, patting the smooth gray side of the machine. This machine will tell you all you need to know about the murder. Oh, to be sure, I shall show you the corpus delicti presently; but why and how this crime was committed shall be revealed only by this machine's stimulation of the deceased's brain. She will herself relate who her killer was!