Evidence Validity
Evidence forms the backbone of any legal case, coming in two main forms: physical evidence (like DNA, fingerprints and CCTV) and testimonial evidence (statements from victims, witnesses and experts). For evidence to be useful, it must be reliable, relevant and admissible.
The accuracy of evidence significantly impacts its validity. Physical evidence is generally considered objective and precise, not relying on potentially flawed human memory or perception. However, evidence can be compromised through contamination, as happened in Adam Scott's case where he was wrongfully convicted of rape after his DNA sample was cross-contaminated in a lab that reused equipment.
Another factor affecting evidence validity is currency - whether the collection methods and interpretations are up-to-date and widely accepted. Modern forensic techniques must be employed to ensure evidence isn't compromised. Different types of evidence also carry different weight in court, with DNA typically considered more reliable than eyewitness testimony. The case of Andrew Makinson illustrates this issue - he spent years wrongfully imprisoned based primarily on witness identification despite not matching the victim's description and later being exonerated by DNA evidence.
Remember: Even seemingly solid evidence like DNA only proves someone was present at a scene, not necessarily that they committed a crime. This is called circumstantial evidence - it suggests but doesn't directly prove guilt.


























