An Interactive Visualization Framework for Forensic Bullet Comparisons

Music City Center 

The current method for forensic analysis of bullet comparison relies on manual examination by forensic examiners to
determine if bullets were discharged from the same firearm. This process is highly subjective, prompting the development
of algorithmic methods to provide objective statistical support for comparisons. However, a gap exists between the
technical understanding of these algorithms and the typical background of many forensic examiners. We present a
visualization tool designed to bridge this gap, allowing for the presentation of statistical information in a more familiar
format to forensic professionals. This forensic bullet comparison visualizer features a variety of plots that will
enable the user to examine every step of the algorithmic comparison process. The utility of the tool is demonstrated
by applying it to data from the Houston Science Lab, where it helped identify an error in the comparison process caused
by mislabeling. This tool can be used for future investigations, such as examining how distance between shots affects
scores. The framework offers a user-friendly way to convey complex statistical information to forensic examiners, facilitating
their understanding and utilization of algorithmic comparison methods.

Data Visualization

Interactive Forensic Modeling

Cross-correlation function

Land engraved area

Forensic pattern analysis

Forensic statistics