| A | B |
| Alibi | A plea offered by an accused person of not having been at the scene of the crime. |
| Clue | Something that appears to give information toward solving the crime. |
| Deduction | Collecting the facts and drawing a possible conclusion. |
| Evidence | Someone or something that proves who committed the crime. |
| Red herring | A false lead that throws the investigator off track. |
| Sleuth | An investigator or detective. |
| Suspects | People who appear to have a motive to have committed the crime. |
| Witness | Person who has personal knowledge about the crime. |