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OCR Page 1 of 46December 31, 1963
Mr. 0. A. Jones
Captain of Police
Forgery Bureau
Subject: William McEwan Duff
Polygraph Examination
Sir:
A polygraph examination was given to William McEwan Duff upon the request
of Lieutenant Cunningham to determine if he had any guilty knowledge
about the shooting at General Edwin Walker. This test was conducted at
8:00 P.M. on June 12, 1963. Below is a list of pertinent questions
asked.
1. Do you have a grudge with General Walker? Answer: No
2. Did you shoot at General Walker? Answer: No
3. Do you remember who you were with the night General Walker was
shot at? Answer: No
4. Have you given information to anyone about the activity of
General Walker or the layout of the house except the two men
from Oklahoma? Answer: No
5. Have you owned or had in your possession a high powered rifle
since you have been in Dallas? Answer: No
5. Do you know who shot at General Walker? Answer: No
Lieutenant Cunningham set this appointment up and was the investigating
officer. This officer had left a set of questions for Lieutenant Potts
to bring with Mr. Duff to be examined. Lieutenant Potts was not familar
with this case. Lieutenant Potts was advised there was a definite
language barrier between Mr. Duff and the examiner because Mr. Duff was
an immigrant.
Taking everything in consideration, it was the opinion of this examiner,
that Mr. Duff was truthful on all the above questions except question
number three. Due to a lasp of time between the offense and examination,
this person seemed puzzled over this question which could have caused
the indication of deception. Due to the fact this person answered the
other questions with the truth, it is believed Mr. Duff was confused
rather than lying.
Respectfully submitted,
K.histories
R. D. Lewis
Detective of Police
Identification Bureau
RDL/mel
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