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Blood Evidence
259
Forensics—Blood Evidence
Bloodstains at the Crime Scene—
Forensic Laboratory Kit
By: Gary Schiltz, Retired
Glenbard West H.S., Glen Ellyn, IL
Analysis of bloodstains at a crime scene can be critical in solving a crime. Blood type can be determined and matched to potential suspects. Students will utilize simulated blood and blood typing sera to learn the principles of blood typing procedures. They extract and type blood from items found at a mock crime scene and determine possible connections to potential suspects. The materials can be adapted to your own crime scene scenario and used to produce crime scene stains of your own design. No blood or blood products are used.
Complete for 30 students working in pairs. Super Value Kit is complete for 5 classes of 30 students working in pairs. Refill Kit also available.
Bloodstain Pattern Analysis—
Forensic Laboratory Kit
By: The Flinn Staff
Blood and bloodstains are common at many crime scenes. Beyond blood type, stain patterns can often reveal key elements in reconstruct- ing the crime. In this lab, simulated blood is used to collect data in bloodstain patterns. Students drop simulated blood under controlled conditions in the laboratory. By controlling the height and angle of each drop, students can analyze spatter patterns and use the trends like a criminalist to analyze the origin of unknown bloodstains. The point of origin of blood at a crime scene can be very significant for forensic scientists in solving crimes. Bloodstain analysis is guaranteed to add a new level of student interest in your “who-dun-it” forensics unit. Includes simulated blood, crime scene unknowns, pipets, rulers, protractors, student laboratory directions and background information.
Complete for 30 students working in pairs.
Blood Typing Kits See pages 5–6.
Presumptive Blood Test—
Forensic Demonstration Kit
By: The Flinn Staff
This kit utilizes a simulation of the Kastle–Meyer Color Test and can be safely used in a mock crime scene investigation. The Kastle–Meyer Color Test is often used by crime scene investigators to presumptively indicate if blood is present on an object. For this activity, objects in your crime scene can be “seeded” to provide positive color tests for “simulated blood” when sprayed with the phenophthalein test solution. The test is fast and easy and is thus ideal for use in the first moments at a crime scene. Crime scene investigators like this test even if the results are only “presumptive” and not considered hard proof. The presump- tive tests can often lead investigators in the right direction to search for additional proof. The kit contains enough materials to conduct many simulated Kastle-Meyer Color Tests on crime scene items. Comes complete with background information and directions.
Concepts: Presumptive test, oxidation.
Time Required: 15 minutes
Materials Provided: Phenolphthalein solution, spray bottle, cotton cloth, filter paper, simulated blood plasma.
Bloodstains at the Crime Scene—Forensic Laboratory Kit AP6502
Catalog No.
Description
Price/Each
AP6502
Bloodstains at the Crime Scene— Forensic Laboratory Kit
$ 49.45
AP7610
Bloodstains at the Crime Scene— Super Value Laboratory Kit
100.60
AP9590
Bloodstains at the Crime Scene— Refill for Super Value Kit
65.50
Catalog No.
Description
Price/Each
FB1643
Bloodstain Pattern Analysis—Forensic Laboratory Kit
$37.80
FB1876
Simulated Blood, 500 mL
28.35
Bloodstain Pattern Analysis—Forensic Laboratory Kit FB1643
Catalog No.
Description
Price/Each
FB1646
Presumptive Blood Test—Forensic Demonstration Kit
$22.80
FORENSICS—BLOOD EVIDENCE continued on next page.
Presumptive Blood Test—Forensic Demonstration Kit FB1646