Warm Up Objective: Scientists will describe crime scene analysis by analyzing their mini crime scene. What is the topic? What will you be doing? Why is this important? How will you know if you have done well?

Warm Up Objective: Scientists will describe crime scene analysis by analyzing their mini crime scene. What is the topic? Crime scene analysis What will you be doing? analyze mini crime scene Why is this important? Basics of forensic science; future career choice How will you know if you have done well? Able to describe crime scene analysis; analyzed mini crime scene

Crime Scene— Who is on the team in a crime scene investigation Crime Scene— Who is on the team in a crime scene investigation? What do they do? Police officers: Usually first to arrive. A district attorney may be present to determine whether a search warrant is necessary. Crime scene investigators: Document the crime scene in detail and collect evidence. Recorders to record the data, sketch artists to sketch the scene, photographers to take photos of the scene, and evidence collectors. Medical examiner (coroner): Determine the cause of death Detectives: Look for leads by interviewing witnesses and talking to the crime scene investigators about the evidence Specialists: Entomologists---insect biologist, forensic scientists, forensic psychologist, forensic anthropologists, etc. may be consulted if the evidence requires their expertise.

Step 1 Securing the Scene: This the responsibility of the first responding police officer (first responder). The safety of all individuals in the area is the first priority. Preservation of evidence is the 2nd priority. Restricts unauthorized persons from entering. Transfer, loss, or contamination of evidence can occur if the area is left unsecured (Locard’s exchange principle). A security log of all those who visit the crime scene will be taken. The officer collects pertinent information and requests any additional needs required for the investigation.

Step 1: Securing the Scene Place crime scene tape around your crime scene. On the lines below, write the names, dates, and times of any person visiting the scene.

Step 2 Separating the Witnesses: Witnesses must not be allowed to talk to each other. Their accounts of the events will be compared. This separation is done to avoid witness working together to create a story (collusion). The following questions need to be asked of each witness: When did the crime occur? Who called in the crime? Who is the victim? Can the perpetrator be identified? What did you see happen? Where were you when you observed the crime scene?

Step 2: Separating the Witnesses In this case, there are no witnesses to separate. On the lines below, write the possible interview of a witness for your scene.

Step 3 Scanning the Scene: Forensic examiners scan the scene to determine where photos should be taken. A determination may be made of a primary crime scene and secondary crime scene.

Step 3: Scanning the Scene Establish forensic examiners. On the lines below, answer these two questions: Where should photos be taken? Is this a primary scene? A secondary scene? Explain your response.

Step 3: Scanning the Scene Establish forensic examiners. On the lines below, answer these two questions: Where should photos be taken? Photos should be taken at different distances and angles. Is this a primary scene? A secondary scene? Explain your response. Group 1, 2, and 5—primary because dead body is there Group 3—primary because no indication of death Group 4—secondary – indication of death but no body

Step 4 Seeing the Scene: Photos of the overall area and close-up photos with and without a measuring ruler should be taken. Triangulation of stationary objects should be including the photos as reference points. A view of the crime scene should be taken from several different angles and distances. Several close-up photos of any evidence and bodies should be taken.

Step 4: Seeing the Scene Establish a crime scene photographer. Take photos of the overall area from various distances and angles. Create evidence markers. Work with your team to place these evidence markers with evidence. Take closeup photos with and without a measuring ruler. Text or email your pictures: 352-874-5567; Smreed@bcps.k12.md.us Be sure to include your group number and class period

Step 5 Sketching the Scene: An accurate rough sketch of the crime scene is made, noting the position of the body (if any) and any other evidence. All objects should be measured from two immovable landmarks. North should be labeled, and a scale of distance should be provided. Any other objects in the vicinity should be included (doors, windows, furniture, trees, vehicles, hedges, and other structures). Later, a more accurate, final copy of the crime scene should be made for possible presentation in court. Computer programs are available to later create a neater and more accurate sketch suitable for use in court proceedings.

Sketching the Scene

Warm Up **Take out yesterday’s paper** Objective: Scientists will describe crime scene analysis by analyzing their mini crime scene. What is the topic? What will you be doing? Why is this important? How will you know if you have done well?

Warm Up Objective: Scientists will describe crime scene analysis by analyzing their mini crime scene. What is the topic? Crime scene analysis What will you be doing? analyze mini crime scene Why is this important? Basics of forensic science; future career choice How will you know if you have done well? Able to describe crime scene analysis; analyzed mini crime scene

Step 6 Searching for Evidence: A pattern should be walked, and location of evidence marked, photographed, and sketched. Single investigators may use a grid, linear, or spiral pattern. A group of investigators might use a linear, zone, or quadrant pattern. These patterns are systematic, ensuring no area is left unsearched. Additional light sources might be needed to find hair and fibers. A flashlight for examination and forceps for collecting are preferable, since this method avoids picking up extra materials that are not evidence.

Step 6: Searching for Evidence What type of pattern would you use? Why would this type of pattern be most appropriate? Do NOT actually collect the evidence, but what evidence exists (or probably exists) that would need to be collected? Explain briefly what this evidence might explain about the victim, suspect, or events.

Classification of Evidence by Nature Biological—blood, semen, saliva, sweat, tears, hair, bone, tissues, urine, feces, animal material, insects, bacterial, fungal, botanical Chemical—fibers, glass, soil, gunpowder, metal, mineral, narcotics, drugs, paper, ink, cosmetics, paint, plastic, lubricants, fertilizer Physical—fingerprints, footprints, shoe prints, handwriting, firearms, tire marks, tool marks, typewriting Miscellaneous—laundry marks, voice analysis, polygraph, photography, stress evaluation, psycholinguistic analysis, vehicle identification Kendall/Hunt Publishing Company

Step 7 Securing and Collecting Evidence: All evidence needs to be properly packaged, sealed, and labeled. Specific procedures and techniques for evidence collection and storage must be followed. Liquids and arson remains are stored in airtight, unbreakable containers. Moist biological evidence is stored in breathable containers, so the evidence can dry out, reducing the chance of mold contamination. After the evidence is allowed to dry, it is packaged in a paper bindle (druggist’s fold), which can then be placed in a plastic or paper container. This outer container is sealed with tape and labeled with the signature of the collector written across the tape.

Step 7, continued An evidence log and a chain of custody document must be attached to the evidence container. The evidence log should contain all pertinent information, including the case number, item inventory number, description of the evidence, name of suspect, name of victim, date and time of recovery, signature of person recovering the evidence, and the signature of any witnesses present during collection.

Step 7, continued In securing evidence, maintaining the chain of custody is essential. The individual who finds the evidence marks it for identification and bags the evidence in a plastic or paper container. The final container for the evidence is a collection bag, which is labeled with pertinent information. The container is then sealed, and the collector’s signature is written across the sealed edge. The container is given to the next person responsible, who will take it to the lab and sign it over to a technician, who opens the package for examination at a location OTHER than the sealed edge. On the completion of the examination, the technician repackages the evidence with its original packing, reseals the evidence in a new packaging, and signs the chain-of- custody log attached to the packaging. This process ensures that the evidence has been responsibly handled as it was passed from the crime scene to the courtroom.

Securing and Collecting the Evidence Do NOT actually collect the evidence. Explain on the lines below how would you collect the evidence present at your scene. Why would you use this method?   Complete the evidence log for one piece of evidence. Why is keeping a chain of custody important?

Finished? In your crime scene report, you should have: Names and roles of all students Crime Scene Entry log—name, date, times of entry and exit, reason for entering Photo log Rough sketch Final sketch Crime Scene Notes Description of the scene Description of the events (eyewitness testimony, video surveillance info, etc.) List of evidence collected—includes description and location of evidence Evidence log Description of victim (name, birthdate, address, demographics) Medical Examiner determination Crime Scene Summary Conclusions

Rough Sketch to Final bsapp.com

Notes Match to sketch Use a key Quick, short, bulleted What can you not see from the photo? bsapp.com