FSC100 Lecture 10B

What proves an alteration has been made to a document?

Evidence of a second writing instrument

What methods are used for ink differentiation?

Visual examination, microscopic examination, alternate light sources, video spectral comparison, and thin-layer chromatography

What types of light are used in ink differentiation?

Ultraviolet (UV) and infrared (IR) light

What is Video Spectral Comparison (VSC)?

A method using infrared imaging equipment to detect luminescent features in inks

What is Thin-Layer Chromatography (TLC)?

A semi-destructive technique used to separate ink from paper using a solvent

What is a key principle of evidence recovery?

Evidence may only be collected after the crime scene has been documented in totality

Who is responsible for determining when to release a crime scene?

The officer in charge of the investigation, typically a criminal investigator

What must be done before releasing a crime scene?

Cross-check evidence logs, ensure proper packaging and labeling of evidence, and conduct a final walkthrough

What challenges do survivors face after a crime scene is processed?

They are left with the disarray of the scene, which can cause mental distress

Who typically performs cleaning of a crime scene?

Specialized, privatized cleaning companies

What is required for cleaning a crime scene?

Full personal protective equipment and adherence to strict guidelines for hazardous materials

What is the Chain of Custody?

A process that maintains the integrity of evidence from collection to submission to the forensic laboratory

What does a case file include?

All documentation, case narrative, logs, Chain of Custody forms, and laboratory requests

What is the purpose of a case narrative?

To provide a chronological account of the crime scene investigation

What should be avoided in a case narrative?

Irrelevant information, analyses, or conclusions

What is the role of the Center Receiving Office (CRO) in evidence submission?

To ensure evidence is computerized and forwarded to the appropriate forensic unit

What factors affect the time frame for forensic analysis?

Nature and complexity of testing, workload, availability of scientists, and oversight processes

What is the CSI Effect?

The phenomenon where popular media portrayals influence public perception of crime scene investigations

What is the significance of documenting the final conditions at a crime scene?

To provide a record of the scene's state upon release and authority for that release

What should be included in the final walkthrough of a crime scene?

Discussion with the investigator about investigative leads and any additional steps needed

What is the typical duration for processing a major crime scene?

Days or weeks, and in rare cases, it can be held for years

What is a common misconception about crime scene processing in media?

That it is always timely and efficient, when in reality it can take much longer

What is the role of the coroner or medical examiner in death investigations?

They have authority over the crime scene and must be consulted before release

What is a potential issue with evidence collection at a crime scene?

Not all evidence may be physically retrievable or obvious

What should be reported in a case file?

All information should be reported in chronological order and based on facts

What is the importance of proofreading a case file?

To ensure accuracy and clarity of the information presented

What is the purpose of a Chain of Custody form?

To document the handling and transfer of evidence throughout the investigation