[Laboratory Report from the Federal Bureau of Investigation #3] Page: 7 of 10

                                
A single brown viscose fiber and several light green cotton
libers were found adhering to the >10 paper bag. These libers match in
microscopic characteristics the brown viscose libers and light green cotton
fibers present in the composition of the Q12 blanket and could have
originated from this blanket.
It is pointed out, however, that fibers do not exhibit sufficient
individual microscopic characteristics to be positively identified as
originating from a particular source to the exclusion of all others.
No fibers were found on the Kl gun that could be associated with
the Q12 blanket and no fibers were found on the Q10 paper bag that could
be associated with the QI1 shirt.
The debris, including foreign textile fibers and hairs, removed
from the Q12 blanket and Qll shirt has been placed in pillboxes for possible
future comparisons. These pillboxes and the glass microscope slides
containing fibers removed from Kl and QIC are being temporarily retained
in the Laboratory for possible future comparisons with additional items of
the suspect's clothing should they be recovered.
The Q12 blanket has been folded double and one corner has been
folded in and pinned with a safety pin. A length of white cotton cord has
been tied around this corner giving it a triangular-shaped appearance as
if it had once contained a long object.
The paper of the wrapping and the tape, QIC, were found to have
the same observable physical characteristics as the known wrapping paper
and tape, R2, from the Texas Public School Book Depository.
The inside surface of specimen Q1Q did not disclose markings
identifiable with the rifle, Kl. A. number of indentations, folds and
extraneous markings appear on the inner surface of the 0.10 wrapping.
The latent prints appearing in the photograph taken of the rifle,
SCI, by the Dallas Police Department, are too fragmentary and indistinct
to be of any value for identification purposes. Photographs of this weapon
taken by this Bureau also failed to produce prints of sufficient legibility for
comparison purposes.
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PC-78243 BX (continued on next page)