Skip to main content

Presumptive Tests.

In forensic science, presumptive tests are commonly used to quickly identify the presence of drugs or other substances at a crime scene or on a suspect. These tests are typically designed to be simple, quick, and sensitive, and are used as a preliminary screening tool before more definitive confirmatory tests are conducted in a laboratory.

Some common types of presumptive tests used in forensic science include:

Colorimetric tests: These tests rely on changes in color to indicate the presence of a particular substance. For example, the Marquis test can detect the presence of opiates, and the Duquenois-Levine test can detect the presence of marijuana.

Microcrystalline tests: These tests involve adding a reagent to a sample to produce characteristic crystals that can be identified under a microscope. For example, the Scott test can detect the presence of cocaine.

Immunological tests: These tests use antibodies to detect the presence of specific proteins or other molecules. For example, the ELISA test can detect the presence of HIV antibodies in blood.

It is important to note that while presumptive tests are useful for quickly identifying the presence of a substance, they are not always accurate and can produce false positive or false negative results. Therefore, a confirmatory test is always necessary to confirm the presence of a particular substance.

Popular posts from this blog

Preliminary Investigations Report.

A preliminary investigations report is an initial document that summarizes the findings and progress of an ongoing investigation into an incident. It serves as an interim report, providing an overview of the initial information collected and the steps taken during the early stages of the investigation. Here are some key components typically included in a preliminary investigations report: Introduction: Provide a brief introduction to the report, stating the purpose, scope, and context of the investigation. Incident Summary: Provide a concise summary of the incident, including the date, time, location, and a high-level description of what occurred. Investigation Team: Identify the members of the investigation team or individuals involved in the preliminary investigation. Methodology and Approach: Describe the methods, techniques, and approaches used in the preliminary investigation. This may include witness interviews, documentation review, site visits, data analysis, and any other inve...
Read more

The Criminal Procedure Code (CPC) Kenya: Cap 75.

The Criminal Procedure Code (CPC) is a law that governs the procedures that must be followed in criminal cases in Kenya. It outlines the steps that must be taken from the time an individual is arrested to the time they are either acquitted or sentenced. The CPC provides guidance on how the police, the courts, and other actors in the criminal justice system should handle criminal cases. Some of the key provisions of the Criminal Procedure Code in Kenya include: 1. Arrest: The CPC outlines the procedures that must be followed when arresting a suspect. For example, a police officer must inform the suspect of their right to remain silent and their right to legal counsel. 2. Bail: The CPC provides for bail for suspects who have been arrested, subject to certain conditions. Bail may be granted by a court or a police officer. 3.Investigation: The CPC outlines the procedures for investigating criminal offenses, including the powers of the police to search and seize evidence. The Code also prov...
Read more

The Witness Protection Act-Kenya.

 The Witness Protection Act is a legislation in Kenya that provides for the protection, support, and welfare of witnesses who cooperate with law enforcement agencies and the justice system in criminal proceedings. The Witness Protection Act is based on the Witness Protection Act, No. 16 of 2006, and subsequent amendments. The Witness Protection Act aims to encourage witnesses to come forward and provide crucial testimony in criminal cases, particularly in situations where their safety and well-being may be at risk. It establishes mechanisms and procedures to ensure the security and protection of witnesses and their families. Key provisions of the Witness Protection Act include: Witness Protection Program: The Act establishes a Witness Protection Program, which is responsible for providing protection and support to witnesses, their families, and other persons who may be affected as a result of their cooperation. The program operates under the authority of the Witness Protection Agen...
Read more