An example of a chain of custody would be the recovery of a bloodied knife from a crime scene: the evidence requires conscientious handling to avoid manipulation. The chain of custody is called the sequential documentation or trace that takes into account the sequence of custody, control, transmission, analysis and disposal of physical or electronic evidence. The goal is to establish that the evidence is related to the alleged crime, was collected at the crime scene and was in its original/unchanged state, rather than having been manipulated or fraudulently “planted” to make someone appear guilty. The chain of custody preserves the integrity of the sample. The traceability of the recording of the control, transfer and analysis of samples shows the transparency of the procedure. [4] The Chain of Custody Protocol is an office and on-call service offered by the laboratory to document the transfer of samples and enable advanced sample storage. On all samples covered by the chain of custody, a written record of the transfer of the patient`s sample to the analyst for storage and disposal is kept. All drug, alcohol or other tests that are of medico-legal significance should be accompanied by a chain of custody. The chain of custody (CoC) in legal contexts is the chronological documentation or paper trace that records the custody order, control, transmission, analysis and disposal of materials, including physical or electronic evidence. The application of the concept in civil proceedings and, in a broader sense, in drug testing of athletes and in supply chain management, e.B is of particular importance in criminal cases. improve food traceability or provide assurance that wood products come from sustainably managed forests. It was often a long process [weasel words] that was necessary for the evidence to be legally presented in court. However, with new wearable technology that allows for accurate, lab-quality results at the crime scene, the chain of custody is often much shorter, meaning evidence can be processed much faster for the court.

The chain of custody is a tracking record that begins with detailed notes to the locations that describe where evidence was received or collected. Collection, preservation, packaging, transport, storage and inventory techniques are part of the process used to establish the chain of custody. The chain of custody is established each time an investigator deposits evidence at a crime scene. The chain is maintained when evidence comes from another agent or detective. The chain of custody is the movement and location of physical evidence from the time it is obtained until it is presented to the court and used to prove the integrity of evidence. To track the chain of custody, a written record is kept so that employees who are in possession of the evidence at different times can be easily identified and summoned to testify if necessary during the trial. Whenever the act of inquiry is changed, a signature, date and time are required for the chain of custody form. A sample shall be deemed to be kept if it is actually in the physical possession of the authorised depositary in a secure place, without access to unauthorised personnel or possibility of manipulation. Chain of custody documentation serves three main purposes; Ask the analytical laboratory relevant questions about the evidence, keep a chain of custody record, and document that the sample/evidence was processed only by authorized personnel and was not accessible for handling prior to analysis. A record of the chain of evidence must be kept and created in court when evidence is presented as evidence. [2] Otherwise, the evidence may be inadmissible in court, raising serious questions about its legality, integrity and review. [3] The chain of custody documents any transmission from one person to another from the moment evidence is collected to establish that no one else could have accessed or possessed it without authorization.

Although there is no limit to the number of transfers, it is important to keep this number as low as possible. Although Headspace GC is the standard method for legal alcohol testing, medical test results for serum alcohol levels are sometimes used as evidence to track people charged with impaired driving. However, the chain of custody is not maintained in medical blood alcohol tests, and it is up to the judge supervising the case to decide whether such results can be admitted to court. Persons who take over the custody of evidence, from collection to analysis, sign a chain of custody document or otherwise perform a secure electronic transmission that identifies them as contributors to the analysis of evidence. When evidence is submitted to a business and evidence division or forensic laboratory, a receipt is received documenting the transfer. The result of a positive urine screening during medical drug tests is confidential information and cannot be used against the patient for punitive measures, such as. B report the result to his employer. Therefore, a chain of custody is not required for medical drug testing. The result of drug tests is confidential information. Even if the drug test is positive, it cannot constitute evidence against the person for disciplinary or punitive measures.

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