Most forms of pattern evidence are not built on an agreed-upon underlying quantitative framework. Forensic scientists typically reduce crime scene pattern evidence to a set of features to examine and analyze, which leaves room for inconsistencies and varying certainties — and lessens the strength of the forensic evidence. DNA evidence, with an underlying biological science and probabilistic model, provides a roadmap for how forensic science, data and statistical methods can enable forensic scientists to best draw conclusions from pattern evidence.
CSAFE researchers work to develop explicit probability models for the measurements obtained from forensic pattern evidence and to use these models to draw conclusions about the probative value of pattern evidence. Research is underway to:
Pattern evidence includes any markings produced when one object comes into contact with another object:
Pattern evidence also involves the evaluation of handwriting, typewriting and writing instruments.
Vital to developing plausible probabilistic models for the different kinds of pattern evidence, we collaborate with: