Crime Scene Investigation (CSI) has witnessed a long era of technological advancements going past the boundaries of traditional methods such as manual photography and fingerprinting. The increasing complexity of Modern crime and the need for precise and irrefutable evidence have grown to fill the gaps in conventional investigation techniques. The paper will explore how emerging technologies 3D scanning, drones, robotics, and artificial intelligence, have revolutionized CSI practices. 3D scanning enables a complete and reproducible digital record of crime scenes; Drones enable aerial forensics as well as mapping; Robots aid in hazardous environments as well as laboratory automation. The paper further shows how AI improves the analysis of digital, biological, and physical evidence. For example, these might include DNA phenotyping, automated fingerprint matching, and ballistics analysis. The paper covers areas such as crime scene reconstruction using virtual reality and the application of LIME for creating transparency through object recognition in crime scene images. Additionally, it will include the role of IoT devices, blockchain technology, and cloud computing in evidence collection and preservation, as well as the chain of custody. This paper ends with several case studies that portray instances where technology has played a significant role in resolving complicated crime investigations, along with noting some of the challenges that come with the implementation of such technologies, costs, and training, among others.