Page 9 - An Inky Lead Questioned Documents

Post-Lab

Solutions

Handwriting Analysis 5. Give a hypothesis for which ink was added
later.
The ink that is different makes the most sense,
1. Were any of Louise Mondelo’s signatures though students should realize that they
on the receipts similar to John Gretzky’s? cannot prove this.
Which?
Signatures on receipts 501092 and 501093 are 6. Examining the ink patterns for the values of
similar to JW Gretzky’s.
all signatures, what patterns exist?
Answers will vary. Mostly 1’s were added to the

2. Did John Gretzky forge Louise’s name? beginning of the receipt values, though one 2
Explain your reasoning. was added at the beginning and one trailing 0
Most likely, yes. Reasoning will vary. was added. In general, space on the value block
was exploited.

3. What additional information/evidence would
be useful in your investigation? 7. Compare the ink pattern on the receipts you
Additional exemplars of John Gretzky and Lyle believe are forged to those you believe are
Mondelo’s handwriting. authentic. What conclusions or avenues for
further investigation can you purpose from
this evidence?
Answers will vary. Likely conclusions are
Chromatography that John Gretzky created forgeries. This is
supported by the use of the same ink by Gretzky
on the forged receipts as for the ones he filled
4. What digits were in a different ink? out legitimately and those he most likely added
Receipt 500519: First Digit (1) an additional digit to. It is also supported by
500745: First Digit (1) the dates being out of order with the receipt
500757: Second Digit (1) numbers.
500907: First Digit (2)
500963: Last Digit (0)
501002: First Digit (1)

THE MYSTERY OF LYLE AND LOUISE 9