Blood spatter patterns are the shapes and distributions of blood that result from a violent event, such as a gunshot or stabbing. These patterns can provide important information about the circumstances of the incident, including the type of weapon used and the position of the victim and assailant. Forensic experts analyze these patterns to reconstruct the scene of a crime. Different types of spatter, such as high-velocity spatter or passive drops, can indicate the force and direction of the blood's movement. Understanding these patterns helps law enforcement solve cases and gather evidence.