Body camera video does not tell the whole story. Here is how an independent reconstruction tests every account of an officer-involved shooting against the physical evidence.
Bullet holes, strikes and cartridge cases tell the story of a shooting. Learn how trajectory analysis works and what separates a reliable reconstruction from a weak one.
Gunshot residue can reveal how far a gun was from its target, but it has real limits. Here is what GSR evidence can and cannot prove in court.
A gap in the chain of custody can weaken even the strongest evidence. Here is how the chain breaks down and what it means in court.
Crime shows shape what jurors expect from forensic evidence. A veteran CSI explains what television gets wrong about real crime scene work.
Ghost guns have no serial number, but they still leave evidence. Crime scene investigator Robert Walker explains how privately made firearms are identified, documented and traced.