| A | B |
| Crime Scene | location where crime occurred or is suspected of having occurred. |
| Primary Crime Scene | Original location of a crime or accident. |
| Secondary Crime Scene | Alternate location where evidence may be found. |
| Suspect | Person thought to be capable of a committing a crime. |
| Accomplice | Second person associated with committing a crime. |
| Alibi | Statement of where a suspect was at the time of a crime. |
| Testimonial Evidence | Any witness testimony to a crime. |
| Physical Evidence | Material objects present at a crime scene or on the victims. |
| Trace Evidence | Evidence found at a crime scene in small amounts, often microscopic. |
| Police Officer | First person to arrive at a scene of a crime or accident. |
| CSI Unit | Documents the crime scene in detail and collects physical evidence. |
| District Attorney | Present to determine if search warrants are required to proceed and obtains warrants from a judge. |
| Medical Examiner | Determines preliminary cause of death. |
| Specialists | Entimologists, forensic scientists that may be called in if the evidence requires expert analysis. |
| Detectives | Interview witnesses and consult with CSI unit. Investigate the crime. |