SCI114 Evidence, Crime Scene and Analysis Practice Exam Questions With 100% Verified

What is a crime scene? - correct answers any location that may provide potential evidence; examples: persons body, any type of building, vehicles, etc. What is crime scene investigation? - correct answers examination where forensic/scientific techniques are used to preserve and gather physical evidence When are crime scene investigators (CSI's) called? - correct answers after reviewing the scene What is the worst thing a forensic scientist can do when processing a crime scene? - correct answers have a preconceived notion (no opinions, no assumptions) What is the goal of crime scene investigation? - correct answers to recognize, document, and collect evidence at the scene of a crime Crime Scene Processing Procedure - correct answers 1) secure and isolate the scene 2) record the scene 3) conduct a systematic search for evidence 4) record and collect evidence 5) package evidence 6) collect standard/reference samples 7) transport evidence to lab What is the chain of custody? - correct answers a list of all people who came into possession of an item of evidence The records of the chain of custody should include... - correct answers - collectors initials - location of evidence - date/time Presearch & Securing the Scene - correct answers is done by the first responding officer so that you know what type of situation you may be dealing with Presearch & Securing the Scene: What is ARISN? - correct answers Approach with caution Render medical aid Identify additional victims and/or witnesses Secure the scene/physical evidence Notify appropriate personnel What is crime scene safety? - correct answers potential health hazards exist at the crime scene, so use universal precautions and assume things are contangious When/how should you record the scene? - correct answers permanently record the scene in its original, unaltered state ASAP What are the common methods for crime-scene recording? - correct answers notes, sketches, and photos/videos What are investigative notes? - correct answers main type of way to record evidence. must be done consistently, have a lot of details, written descriptions of evidence, and chain of custody What is photography? - correct answers photograph physical evidence as they are found. removal, repositioning or addition of objects may deem the photograph inadmissible (if it is, say that in the notes) What is a photo log? - correct answers details frame #, description, speed, if flash was used, etc. What are sketches? - correct answers show relative locations of objects, provides scale, and supplement photos/notes rough sketch - correct answers hand-drawn at the crime scene, includes measurements, all essential info and legend smooth sketch - correct answers final version of the rough sketch, drawn to scale What is searching? - correct answers systematic and thorough search of the crime scene/physical evidence What is physical evidence? - correct answers any object used, left, removed, altered or contaminated during the crime (by either the victim or the suspect) Evidence Collection Kit Equipment - correct answers paper bags, cardboard boxes, glass vials, metal cans, paper envelopes, plastic bags standard/reference sample - correct answers physical evidence whose origin is known, that can be compared to crime-scene evidence substrate controls - correct answers uncontaminated surface material close to an area where physical evidence has been deposited false positive - correct answers positive result when the substance is not present false negative - correct answers negative result when the substance is present Submission of Evidence - correct answers evidence submission form must accompany the evidence when submitted to the lab for analysis What is intangible evidence? - correct answers evidence that does not have a physical presence/cannot be touched (ex: odor) What is testimonial evidence? - correct answers statement made under oath in response to questioning Physical evidence must... - correct answers -be relevant -establishes a crime has been committed -has optimal value individual characteristics - correct answers a piece of evidence that is unique and can be identified identified/class characteristics - correct answers features shared by all members of a group/class What is a physical match? - correct answers broken, torn or cut materials can be matched back together directly and/or indirectly direct physical matches - correct answers when two pieces of material are physically fit back together using the pattern of the broken edges and surface features indirect physical matches - correct answers occur when two pieces of a material are matched together using surface features, such as scraches or extrusion mark presumptive tests - correct answers quick screening test usually done at a crime scene b/c they provide a reasonable basis for belief or acceptance What are confirmation tests? - correct answers b/c presumptive tests can lead to false results, they must be followed up by another type of test What are blood confirmation tests? - correct answers a microscope/ microcrystal test can be used to confirm blood by viewing the actual blood cells and their reaction Non-Destructive Testing - correct answers evidence should always be looked under a microscope first Destructive testing - correct answers various testing that consumes your sample/evidence, once you are out of sample/evidence, you can no longer run other tests What is done during the Analytical Process? - correct answers -first, a presumptive test -next, a confirmation test further analyses are done to link evidence to individual