Fingerprinting
3 main types of Fingerprint Patterns
What are loops, whorls, arches?
This is the first photo taken in a crime scene investigation to provide the overall view of the entire scene.
What is an overview or wide-angle photograph.
This is the term for the documented record of the collection, handling, transfer, and storage of evidence to ensure its admissible and untampered with in court.
What is the chain of custody?
This is the reason why wet evidence should be dried before packaging.
What is to prevent degradation and contamination, such as mold formation?
This is the purpose of including a fixed point such as a wall or corner in a crime scene sketch.
What is to provide a consistent reference to accurately locate and document evidence?
This is the most common physical method used to develop latent prints on smooth, non-porous surfaces using black, white, or fluorescent particles.
What is fingerprint powder dusting?
This type of evidence is photographed parallel with the camera at a right angle directly above.
What are feet pics? :P
Locard's Exchange Principle
What is every contact leaves a trace?
The best way to maintain the integrity of the chain of custody is through this process.
What is proper documentation that includes a detailed log of date, time, location, method of collection, and individuals handling the evidence?
These two methods use two fixed points to locate evidence.
What are the triangulation and rectangular methods?
These types of characteristics are used to match fingerprints.
What are: ridge endings, bifurcations, dots, and enclosures.
This method of crime scene photography is used to photograph fingerprints, blood spatter, or other evidence by utilizing different lighting techniques.
What is oblique lighting photography?
At a homicide, these three types of evidence should be collected and preserved.
What are biological evidence, trace evidence, and physical evidence?
When collecting firearms from a crime scene, this specific procedure must be followed to prevent accidental discharge and preserve the weapon’s condition for forensic analysis.
What is unloading the firearm, securing it in a box or container with zip ties, and ensuring the weapon is handled safely without disturbing any potential evidence such as fingerprints or ballistic residues?
These are three key differences between a rough sketch and a final (finished) crime scene sketch.
What are: the rough sketch is drawn at the scene, not to scale, and less detailed; while the final sketch is drawn later, to scale, and more polished/detailed?
These chemicals are used on porous and nonporous surfaces (two separate answers).
If it is porous, use Ninhydrin spray. If it is non-porous, use super glue fuming (Cyanoacrylate)
This ISO setting would be most appropriate for a low-light indoor crime scene?
Bonus: This setting would be better for outdoor daylight crime scenes.
What is ISO range 800-1600?
Bonus: What is ISO 100?
Blood spatter analysis can help investigators determine these three factors related to the impact that caused the spatter.
What are the direction, force, and angle of impact?
When collecting trace evidence, these tools are most commonly used.
What are tweezers, tape, specialized vacuums, swabs, alternate light sources, and lasers?
This is the reason why sketches are still required even when digital photography is available.
What is to provide precise spatial relationships and measurements that photos alone cannot accurately convey?
TRUE OR FALSE: Fingerprints deposited in blood can be enhanced using ninhydrin or cyanoacrylate fuming.
What is False. Ninhydrin and Cyanoacrylate target components found in sweat not blood. Blood prints require methods like amido black or leucocrystal violet.
In crime scene photography, this term refers to taking multiple shots at different exposures to capture the best detail and lighting.
What is bracketing?
What is transient evidence?
To avoid contamination when collecting DNA evidence, investigators must take these specific protective measures beyond just wearing gloves.
What is wearing masks, using sterile tools, changing gloves frequently, and avoiding speaking, sneezing, or coughing over evidence?
This method of measurement is most appropriate for large outdoor scenes with no nearby fixed points.
What is the baseline method?