Many criminal cases hinge on the information that is collected during the investigative process. Understanding how the investigative process works can often help people who are facing possible criminal charges. The way that this process works can vary from one case to another; however, there are some basic components that remain fairly constant in almost every investigation.
When a crime is still in progress, the investigative process will usually start at that point. The police officers will usually arrest the suspect right then and collect evidence. If the crime was recently committed, the police officers will likely begin to interview witnesses and collect evidence while they process the scene of the crime.