In order to conduct a successful crime scene investigation, it should be:

A successful crime scene investigation must be methodical and planned due to the complexity and critical nature of collecting evidence. This approach ensures that all potential evidence is thoroughly examined and documented without being overlooked or contaminated. A planned investigation allows investigators to follow specific protocols and techniques tailored to the unique circumstances of each scene, ensuring that evidence is preserved and collected in a manner that will stand up to scrutiny in a court of law.

Being methodical means adhering to established procedures for securing the scene, documenting the conditions, and gathering evidence in a systematic way. This includes steps such as creating a grid for searches, taking photographs, preserving chain of custody for collected items, and properly cataloging all evidence. A random approach, as suggested in other options, could lead to evidence being missed or mishandled, adversely affecting the outcome of the investigation.

Additionally, a planned strategy takes into account the potential hazards and challenges of the environment where the investigation takes place, enabling investigators to effectively use resources and time. Collectively, these factors underscore the importance of a methodical and planned investigation in achieving a successful resolution to a crime scene.