At a robbery/murder crime scene, various types of evidence can be found that help investigators gather information, establish facts, and build a case. Some common types of evidence that might be found at such a crime scene include:
1. DNA evidence: Biological material such as blood, hair, saliva, or skin cells can provide valuable DNA evidence. This evidence can be used to identify potential suspects, confirm the presence of individuals at the crime scene, or link evidence to a specific person.
2. Fingerprints: Fingerprints left behind by the perpetrator or others present at the crime scene can be crucial in identifying individuals and linking them to the crime.
3. Footwear impressions: Footprints or shoe impressions can help identify the type of shoes worn by the suspect or other individuals present at the scene. These impressions can be compared with the footwear of potential suspects.
4. Toolmarks: Toolmarks left on doors, windows, or other objects can provide evidence of forced entry or the use of specific tools during the crime. These marks can help investigators reconstruct the sequence of events.
5. Firearms and ballistic evidence: If firearms were involved in the crime, evidence such as spent cartridge casings, bullets, or gunshot residue can be recovered. Analysis of this evidence can help determine the type of weapon used, trace it back to its owner, or establish the trajectory of the shots fired.
6. Trace evidence: Small, often microscopic, materials such as fibers, glass fragments, paint chips, or soil particles can provide valuable evidence. They can be transferred between individuals, objects, or locations, helping establish connections or provide information about movements.
7. CCTV footage or surveillance recordings: Video or photographic evidence from surveillance cameras in or around the crime scene can capture crucial moments or provide images of potential suspects or vehicles.
8. Witness statements: Statements and testimonies from witnesses who were present during or around the crime scene can provide information about the events, descriptions of individuals, or potential leads.
9. Documents or records: Any documents or records found at the crime scene, such as handwritten notes, financial records, or identification documents, can provide insights into the motive, identity of individuals involved, or their relationships.
10. Mobile phone or electronic device data: Data from mobile phones or electronic devices found at the scene or belonging to victims, suspects, or witnesses can provide valuable information such as call logs, messages, location data, or digital evidence.
It is important to note that the types of evidence collected at a crime scene can vary depending on the specific circumstances of the case. Investigators meticulously document, collect, and analyze all relevant evidence to build a comprehensive understanding of the crime and support their investigation.