Using GIS Technology in the Classroom:

  No Corpus Delicti: Using GIS to Determine the Possible Location of a Missing Person

corpus de·lic·ti (d-lkt) n.
  1. Law. The material evidence in a homicide, such as the discovered corpse of a murder victim, showing that a crime has been committed.
  2. A corpse.

reference http://dictionary.reference.com

 Synopsis-

Occasionally, criminal investigations reach a dead end because no victim can be found. Although it is clear from the crime scene that a violent crime and abduction has occurred, investigators are pressed to find a body.  When no body is found associated with a crime scene it is referred to as "no corpus delicti", no corpse. Additionally, there are numbers of missing persons reported  by loved ones that go unfound.  The  physical evidence associated with the crime scene is in the form of soil and plant material on the primary suspect’s vehicle and footwear tread. This evidence can be scrutinized for type of soil and plant material. The soil is found to have come from Diabase parent rock, the underlying surface geology that the soil has eroded from.  The soil is also identified as a particular type in the Brecknock or Neshaminy Series.  The plant material found on the wheel well is identified as seedpods found in the soil originating from the soybean crop and mosses that only grow on North facing slopes of the hills. Many of the small family owned farms in the Middletown Quadrangle have soy and corn as their primary crop.  There are also urban areas and a large river nearby. None of the farms are near the river because of the large amount of exposed surface rock formation. Many of the farms are found within the limestone and sandstone rock areas, although some are on the diabase even though it is poor farming land.

  This GIS project will use ArcView 3.2 Geographic Information Systems to identify possible locations of the missing victim of the abduction and possible violent crime based on: the identification and location of soil types on local maps; identification and location of parent rock geology; the  identification farm locations and the proximity to local roads.