Bloodstains are marks left by blood on surfaces, often indicating the presence of injury or violence. They can vary in size, shape, and color, depending on factors like the amount of blood, the surface it lands on, and how long it has been there. Bloodstains are commonly analyzed in forensic science to help solve crimes and understand events. In forensic investigations, the study of bloodstains, known as bloodstain pattern analysis, can reveal important information about a crime scene. This analysis can determine the position of a victim or suspect, the type of weapon used, and the sequence of events during an incident.