What an eyewitness observes at a crime scene depends on?

What you observe as a witness depends on what?

Eyewitness accounts of crime-scene events vary considerably from one person to another. What you observe depends on your level of interest, stress, concentration, and the amount and kind of distraction present. Our prejudices, personal beliefs, and motives also effect what we see.

What does observing a crime scene involve?

What does observing a crime scene involve? Documenting the crime scene with notes, photography, sketches, and videography. … The location, shape, or size of crime scene and how many investigators are available.

What are three factors that may affect the memory of an eyewitness in recounting a crime?

Six factors that may affect the memory of an eyewitness in remembering a crime are the nature of the crime and the situation itself (weapon used), the age of the witness, the length of time between the offense and the testimony, interviewing techniques, the witness’s prior relationship with the accused, and any earlier …

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What are 3 things a forensic examiner must be able to do?

The three tasks or responsibilities of a forensic scientist are: Collecting evidence. Analyzing evidence. Communicating with law enforcement and…

What is the first rule of evidence?

Relevancy is the first rule of evidence. Legally Relevant. = any evidence having a. tendency to make the existence of any fact. that is of consequence more probable or less.

What are the four types of witnesses?


  • A lay witness — the most common type — is a person who watched certain events and describes what they saw.
  • An expert witness is a specialist — someone who is educated in a certain area. …
  • A character witness is someone who knew the victim, the defendant, or other people involved in the case.

What are the 5 steps of crime scene investigation?


Are typically the first to arrive at a crime scene?

POLICE OFFICERS are typically the first to arrive at a crime scene. They are responsible for securing the scene so no evidence is destroyed and detaining persons of interest in the crime.

How do you package evidence at a crime scene?

Air-dry and package in a swab container or paper envelope/bag. Do not package in a plastic or zip lock bag. Swabs from areas of a crime scene are not considered “buccal swabs”.

What are three examples of conditional evidence?

It is mostly found in the form of imprints, indentations, striations, markings, fractures, or deposits. Conditional evidence is produced by a specific event or action; important in crime scene reconstruction and in determining the set of circumstances or sequence within a particular event.

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What 4 factors affect the reliability of eyewitnesses?

This is, in large part, because there are numerous factors that may affect the accuracy of eyewitness testimony.

  • Memory reconstruction. …
  • Lineup issues. …
  • Visual characteristics. …
  • Anxiety and stress. …
  • Obtaining legal representation.

What are the 5 types of physical evidence?

The most important kinds of physical evidence are fingerprints, tire marks, footprints, fibers , paint, and building materials .

What is the main goal of a forensic examiner?

Forensic science is a critical element of the criminal justice system. Forensic scientists examine and analyze evidence from crime scenes and elsewhere to develop objective findings that can assist in the investigation and prosecution of perpetrators of crime or absolve an innocent person from suspicion.

What tests do forensic scientists do?

A forensic science technician tests evidence from crime scenes using physical, chemical, and biological analysis.

How much do FBI forensic scientists make?

For example, recent FBI job descriptions reveal the following salaries: Biologist, Forensic Science Research Unit: $27,431 – $44,176 for entry-level trainee positions, with a top salary of $50,287 – $129,517 for those with PhD degrees and advanced education and/or work experience.