What is the definition of a wipe in forensic terms?

In forensic terms, a wipe refers to a stain that occurs when an object, such as a hand or a tool, comes into contact with a surface and smears a substance, such as blood or other biological material, across that surface. This action creates a pattern that can give investigators insight into the movement of individuals or objects in a crime scene. The characteristics of a wipe often reflect the direction of the smear and the type of object involved, providing valuable evidence for understanding the events that transpired.

Other options refer to related forensic concepts, but do not accurately capture the specific definition of a wipe. A chemical stain pertains to substances that may react with a surface, a blood spatter pattern involves droplets created by the force of a blood source, and impact markings result from a direct force applied to a surface without the smearing action associated with a wipe. Each of these terms plays a different role in forensic analysis, emphasizing the distinct nature of a wipe in the examination of crime scenes.