Crime scene analyst Matthew Steiner teaches the techniques forensics experts use to investigate bloodstain patterns, ranging from easy to difficult. Matthew explains how different types of forces ...

In general, bloodstain pattern analysis (BPA) refers to the collection and subsequent forensic analysis investigation of the size, shape, and distribution patterns of bloodstains found at a crime ...

A crime scene investigator who has worked more than 3,000 deaths uses his own blood on social media to teach the world how to approach the job. Jeffrey Gentry, 40, is a certified bloodstain pattern ...

Anyone who’s a fan of TV police procedurals and true crime knows that many cases hinge on blood pattern evidence. That’s nothing new. The first documented use of bloodstain pattern analysis, or BPA, ...