As the circumstances around crime change across time and space, so does the crime pattern. The successful investigation of a crime is essential for implementing the law in a criminal case. A practical and fruitful criminal investigation is challenging due to various external and internal factors. The authors attempt to define the difficulties in criminal investigation and propose a solution. Numerous criminal cases exist in society; nevertheless, for this research, the authors focus on two primary forms of crime: first, the investigations of murder cases, and second, the investigation of rape cases. Among forty-nine police stations in the Dhaka Metropolitan region, the study area covers nine following the purposive sampling method. Generally, local police officers designated as inspectors make the primary inquiry of a crime. When the preliminary investigation is inconclusive, the court asks the Criminal Investigation Department (CID) to handle the case in the plaintiff’s best interest. Since CID is a specialized wing for criminal investigation, the authors visited this division and interviewed their investigators. Additionally, newspaper research, media monitoring, expert opinion case studies, and in-depth interviews with various victims assisted the authors in gathering evidence and articulating solutions to address the issues of criminal investigation.