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Video Spectral Comparator (VSC): Principle, Parts, Uses, Advantages and Disadvantages

Video Spectral Comparator (VSC) Principle, Parts, Uses, Advantages and Disadvantages

The Video Spectral Comparator (VSC) is a UV-Vis-IR imaging spectral device designed for forensic examination and authentication of questioned documents. It was developed by Foster and Freeman. A basic VSC unit consists of a high-sensitivity camera, different light sources, a software/viewing interface, and a positioning stage. The built-in multiple spectrum sources can reveal hidden characteristics …

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Electrostatic Detection Apparatus (ESDA): Working, Principle, Procedure, Advantages & Disadvantages

Electrostatic Detection Apparatus (ESDA) Working, Principle, Procedure, Advantages & Disadvantages and precautions

Electrostatic Detection Apparatus (ESDA) is an electrostatic detection device (EDD) specifically made by Foster and Freeman Ltd. to reveal indented writings on a paper surface. With time, ESDA become synonymous with EEDs for detecting indented writing or marks on forensic questioned documents. Moreover, it offers a non-destructive nature of detecting indentation because it operates on …

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15+ Rules for Choosing Core and Delta in Loop Fingerprint Patterns

11 Rules for Choosing Core in Loop Fingerprint Patterns

11 Rules of Choosing and Identifying Core in Loop Fingerprint Patterns Examination of loop fingerprint patterns starts with identifying the core. In general, the core is considered the center point in a fingerprint pattern. In any case, a fingerprint expert has to follow some sets of rules to assign an area in the fingerprint as …

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How to Compare Fingerprints at Home? A Simple Guide by Forensic Expert

Forensic fingerprint experts have a set of guidelines that are needed to follow to compare fingerprints. But in this simple guide, I will tell you how you can compare fingerprints at home. You only need a questioned (unknown fingerprint sample) and a reference (known fingerprint from the individual). If you’re doing only one set of …

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Comparing Fingerprints At School: A Fun Activity for Students and Teachers

Comparing Fingerprints At School A Fun Activity for Students and Teachers

Forensic fingerprint experts follow a set of rules for comparing fingerprints. But in this simple guide, I will show you how you as a teacher can create a fun activity for their students who have no prior knowledge of comparing fingerprints. For this forensic fingerprint comparison school activity, you don’t need any sophisticated tools. The …

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Amido Black in Fingerprint Development: Principle, Procedure, Advantages, and Disadvantages

Amido Black in Fingerprint Development principle, procedure advantages and disadvantages

Amido Black, also known as Acid Black 1, is an acid diazo dye used by forensic fingerprint experts to detect and enhance latent blood marks. Amido Black stains proteins forming a dark blue-black colored product. It is the most widely used protein stain dye for the development of bloody fingerprints on both nonporous and porous …

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6 Tests to Solve Disputed Paternity and Maternity in Forensic Science Cases

6 Tests to Solve Disputed Paternity and Maternity in Forensic Science Cases

There are three main reasons why disputed paternity and maternity cases are used in forensic sciences. Following are the tests and techniques used in solving disputed paternity and maternity cases involving legal systems and forensic evidence. 1. ABO Blood Group System Human blood type is predetermined by particular GENES that we inherit from our parents. …

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