1.1.1-2 A sketchy science and Reliable Witnesses?

Decedent

In forensic investigations and medical cases, the person who has died is often referred to as the decedent.

Search Methods

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Link Method

There is no set pattern. The method requires the investigator to be able to form logical links between crime scene activity and the likely places additional evidence could be found at the scene as a result.

Line Method

Used on large, outdoor crime scenes. Members of the search team are arranged at regular intervals, usually arm’s length, and then proceed to search along straight lines.

Spiral Method

Used on crime scenes with no physical barriers, such as open water. Can either begin at a critical point of the crime scene (outward spiral) or the outer-edge of the crime scene (inward spiral).

Grid Method

Used on large, outdoor crime scenes. Searchers follow the first line pattern and search in the same manner as the line method. Once the first line pattern is complete, searchers realign on the other line pattern.

Wheel Method

Used on small, circular crime scenes. Investigators start from a critical point and travel outward along many straight lines from this point.

 Zone Method

Used on crime scenes that are readily definable zones, such as in houses or buildings. Teams are assigned small zones for searching, and then other appropriate searching methods are employed in each zone.

Point of Origin

One strategy they use is to identify a point of origin from which they take all their measurements. The origin can be any item or location within the scene perimeter 

Traits of a Biomedical Scientist

A good Communicator,Collaborative,and a problem solver

Person of Interest

someone who law enforcement thinks may have information related to a possible crime. 

Polygraph tests

use multiple sensors and computer software to record data and display data. The sensors record physiological changes in heart rate, blood pressure, respiration rate, skin conductivity, and/or perspiration.

Heart rate

A measure of cardiac activity usually expressed in the number of beats per minute.

Blood Pressure

The pressure exerted by the blood upon the walls of the blood vessels.

Respiration Rate

The number of breaths an organism takes per minute.

Skin Conductivity

How the amount of sweat produced impacts the ability to conduct electricity.

A faster heart rate means more blood is being pumped and respiratory rate relates to this.

Can polygraphs be used in court?

No,they are not solid evidence.

Iterative

Repeating a series of steps over and over until the desired outcome is obtained.

The Steps to Experimental Design

1.Identify the question

2.Make a Prediction

3.Design an experiment

4.Conduct the Experiment

5.Analyze the data

6.Communicate Findings