Forensic palynology
Forensic palynology is the study of pollen and powdered minerals, their identification, and where and when they occur, to ascertain that a body or other object was in a certain place at a certain time. For instance, a dead body may be found in a wood, and the clothes may contain pollen that was released after death (the time of death can be determined by forensic entomology), but in a place other than where it was found. That indicates that the body was moved.