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1. Securing the Scene
2 Separating the Witnesses
3. Scanning the Scene
4. Seeing the Scene
5. Sketching the Scene
6. Searching for Evidence
7. Securing and Collecting Evidence
All of the 7 S's were followed correctly
After Joubert had kidnapped the victims he put them in the back of his car. When he got pulled over by the school for being a suspicious person, the police searched his car and found that thehair in the trunk of his car matched the hair of one the boys who were murdered .
In 1982 Joubert was also linked back to a murder in Maine of another young boy. He left bite marks on the victim which was then able to trace back to Joubert.
Hair is a type trace, class, biological and individual evidence
The hair found during this case helped the police connect John Joubet to the two murdered of the two boys.
Photo of the crime scene from above
Rope (fibers): circumstancial, class, trace
Hair: circumstancial, biological, class, trace
Bite Marks: circumstancial, individual, class
Eye Witness: Direct evidence
Rope used to tie up Danny's hands
Joubert used this rare kind of rope to tie up one of his victims. Since it was so rare it was easy to connect him to the murder when the police found the same type of rope in his car
Rope (fibers) is circumstancial, trace and class evidence
Since John Joubert was lurking around the school a witness was able to have an accuate description of him and report it to the police. This police report made it possible for the police to track Joubert's car and search his car.
Locard's Principle is the fundamental reasoning behind the use of trace evidence in forensic investigation
Eye Witness is a type of direct evidence
Direct Transfer: when fibers are transferred from victim to suspect of suspect to victim
Secondary Transfer: Fibers that the suspect picked up then transferred to the victim
This is the sketch the sketch artist was able to draw based on the witness description.
Natural Fiber: Come from animals, plants, and minerals that are mined from the ground
Synthetic Fiber: man- made fibers
Chris' clothing found by the crime scene
Work Cited
http://www.criminaljusticeschools.org/blog/10-famous-cases-cracked-by-forensics/
http://murderpedia.org/male.J/j1/joubert-john-photos.htm
http://murderpedia.org/male.J/j1/joubert-john-photos.htm
http://iparkerforensics.blogspot.com/p/hair-anf-fiber-analysis.html
Indroduction
After all the evidence found was linked back to Joubert, he was convicted of three murders. Then in 1996 John Joubert was sentenced to death by electric chair.
In 1983 two schoolboys were found murdered in Omaha, Nebraska. One of the boys was found tied up with a stange rope that they were not able to identify. Thankfully police were already investigating a strange man scouting that school, they were then able to trace the license plate back to Joubert. Once they searched his car they were able to find the same unidentified rope and hair matching to the victims. He was then linked to another murder where his teeth matched a bite mark on a young boy. Later he was sentenced to death by electric chair.
Chris Walden: Walking to school when he was kiddnapped
Danny Joe Eberle: First known victim who disappeared while delivering newspapers