The detection of any crime is greatly aided by forensic science, which serves as a tool or aid in the investigation process. It is a science that forensic professionals use to gather and examine all physical evidence. The forensic expert serves as a tool or aid to assist the courts in determining justice. Experts use their knowledge and provide the courts with their reports. Forensic science is divided into many different categories, such as forensic medicine, ballistics, fingerprints, questionable documents, voice analysis, and narcotics analysis. All the tests are carried out in various forensic laboratories.

This article discusses the function of experts and the law governing the reports and opinions of forensic experts and other experts in Indian courts. The court has cited numerous cases in which it has taken into account and relied on the findings of various experts. The pertinent discussion is about the relevance and probative value of the expert reports and opinions in relation to the relevant law. This research addresses the crucial issue of whether forensic reports, expert opinions, or third-party opinions have any value as evidence (or relevance) in Indian courts. It also discusses what the courts look at when examining an expert's forensic report and what factors are taken into account when the courts request one.