What type of evidence is typically sought during a homicide investigation?

In a homicide investigation, DNA evidence from the scene is critical because it can establish a link between the suspect and the crime. DNA is unique to each individual (with the exception of identical twins) and can be retrieved from various sources such as blood, saliva, hair, or skin cells left at the crime scene. This type of evidence has a high probative value as it not only helps identify potential suspects but can also exonerate wrongly accused individuals.

While financial records, witness interviews, and old police reports may provide valuable context or supplementary information, they do not carry the same weight as physical biological evidence in establishing the facts of the case. Financial records could indicate motive but are not directly tied to the act itself. Witness interviews can help gather accounts of the event but can be subjective and potentially unreliable. Old police reports might offer insights into patterns or similar crimes, yet they lack the direct connection to the specific incident being investigated. Thus, DNA evidence stands out as the most essential type of evidence sought in homicide cases.