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Toolmark Impression Comparison Interface

Toolmark Impression Comparison Interface

For the latest NIJ grant, we need an interface that will allow examiners to compare toolmarks from screwdrivers and chisels.

We’re in the process of creating software that will allow us to do a virtual splitscreen. The examiner will move the questioned impression around on the screen, and can compare it to one of 5 different exemplar impressions taken at different angles.

Here is a mockup of the interface, although the final version will differ:

Example Interface

We will create a database of 60 comparisons, 30 from mated screwdriver tips and 30 from non-mated. The examiner will have to match the questioned impression against all 5 angles from one screwdriver.

Morgan Klutzke is doing a great job putting together this interface, and we anticipate collecting data in the final quarter of 2019.

If you are a toolmark or firearm examiner, we need your help! Please use the link below to volunteer for the study, or email Tom Busey

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