There is a number of possible trace evidencethat can likely be found on the corpses of the two bodies. There could be fingerprints, hair, blood, anddirt, fibers from a number of different materials or any other type of debris thatcould have been brought in. Gunshot residue should be present since both appearto have died from gunshot wounds to the head.
Blood, or any other types ofbiological fluid may also be present.Investigators should try to collect any trace,biological, and fingerprint evidence that is present at the scene in order to tryto find out what happened and find a possible suspect or suspects. The Investigatorsneed to study the evidence to try and determine if this actually a homicideinvestigation or if the possibility of a murder/suicide. By collecting allevidence the investigators should be able to correctly establish who killed ourtwo victims.
Investigators need to take a lot ofprecautions in order to prevent evidence contamination while collecting andpreserving the evidence. In order for investigators to make certain that theydo not contaminate, mishandle or lose any evidence they must follow a set ofrules that have been put in place by international standards for crime sceneinvestigations. Investigators must is establish a chain of evidence and follow thecorrect techniques while collecting evidence. They must also make sure that they’rewearing and using the correct equipment. Every piece of evidence collected must beproperly recorded, photographed, and signed by the person who collected it. DNA evidence in a case like this is very important in helping to solving thecase. Our assignment says that there are twodead with apparent gunshot wounds to the head and a fire in the garage. All weknow is that we have two dead people inside the house and a fire in the garagewhich is detached from the house.
Now weneed to figure out if we have two victims or one victim and a dead perpetrator. We will need to collect as much evidenceas we can to try to figure out if there is anything that leads to a personother than the two dead in the house. If any DNA is discovered at the scene thatdoes not belong to our two dead then that could indicate that there is possiblya third person involved in this crime.