| No. | Item | Definition |
|---|---|---|
| 1. | accomplice | helper in a crime |
| 2. | alias | false or assumed name |
| 3. | alibi | proof of being elsewhere |
| 4. | ambush | surprise attack from hiding |
| 5. | arson | criminal setting of fire |
| 6. | assassin | killer of an important person |
| 7. | autopsy | examination of a dead body |
| 8. | ballistics | study of bullets and guns |
| 9. | blackmail | threat for money or favors |
| 10. | break-in | forced illegal entry |
| 11. | breakthrough | major advance in a case |
| 12. | bug | hidden listening device |
| 13. | burglary | illegal entry to steal |
| 14. | case | particular investigation or crime |
| 15. | clue | piece of evidence or hint |
| 16. | confession | admission of guilt |
| 17. | conspiracy | secret plan to do harm |
| 18. | corpse | dead body |
| 19. | crime scene | place where crime occurred |
| 20. | culprit | person responsible for crime |
| 21. | cyanide | deadly fast-acting poison |
| 22. | dead end | useless line of inquiry |
| 23. | deduction | reasoning from known facts |
| 24. | detective | investigator solving a crime |
| 25. | disguise | appearance changed to deceive |
| 26. | DNA | genetic material used as evidence |
| 27. | double-cross | betray by deceiving an ally |
| 28. | eavesdrop | listen secretly to others |
| 29. | enigma | something mysterious and puzzling |
| 30. | escape | get free from confinement |
| 31. | evidence | facts supporting a conclusion |
| 32. | extortion | obtaining money by threats |
| 33. | false lead | misleading investigative clue |
| 34. | fingerprint | unique mark from a finger |
| 35. | footprint | mark left by a foot |
| 36. | forensics | scientific crime investigation methods |
| 37. | forgery | fake document or signature |
| 38. | frame-up | false evidence to incriminate |
| 39. | fraud | deception for gain |
| 40. | fugitive | person fleeing the law |
| 41. | greed | excessive desire for wealth |
| 42. | gumshoe | slang for detective |
| 43. | hardboiled | tough unsentimental detective style |
| 44. | heist | large planned robbery |
| 45. | hideout | secret place for hiding |
| 46. | hitman | paid killer |
| 47. | homicide | killing of one person |
| 48. | hunch | strong feeling without proof |
| 49. | indictment | formal criminal charge |
| 50. | informant | person giving secret information |
| 51. | inheritance | property received after death |
| 52. | inside job | crime by an insider |
| 53. | interrogate | question closely for information |
| 54. | investigate | examine to discover truth |
| 55. | jealousy | resentful desire or suspicion |
| 56. | justice | fair punishment or outcome |
| 57. | kidnapping | taking someone by force |
| 58. | lead | promising clue or direction |
| 59. | locked room | crime in sealed space |
| 60. | loot | stolen goods or money |
| 61. | manhunt | search for a wanted person |
| 62. | mobster | organized crime member |
| 63. | modus operandi | usual method of a criminal |
| 64. | motive | reason for committing a crime |
| 65. | murder | intentional killing of a person |
| 66. | murderer | person who commits murder |
| 67. | mystery | puzzling unexplained event |
| 68. | noir | dark crime fiction style |
| 69. | obsession | unhealthy fixed idea |
| 70. | plot twist | surprising change in story |
| 71. | poison | substance causing illness or death |
| 72. | prison | place for convicted criminals |
| 73. | profile | behavioral description of suspect |
| 74. | raid | sudden police entry |
| 75. | ransom | payment demanded for release |
| 76. | red herring | misleading clue or distraction |
| 77. | revenge | retaliation for a wrong |
| 78. | riddle | puzzling question or clue |
| 79. | robbery | stealing by force or threat |
| 80. | secret | hidden fact or information |
| 81. | serial killer | killer of multiple victims |
| 82. | sleuth | detective, especially amateur |
| 83. | stakeout | watching a place secretly |
| 84. | strangulation | killing by choking |
| 85. | surveillance | close watching of someone |
| 86. | suspect | person thought possibly guilty |
| 87. | tail | follow secretly |
| 88. | testimony | formal spoken evidence |
| 89. | theft | act of stealing |
| 90. | timeline | ordered sequence of events |
| 91. | tip-off | warning or useful information |
| 92. | trial | court examination of a case |
| 93. | unmask | expose hidden identity |
| 94. | verdict | jury’s decision |
| 95. | victim | person harmed or killed |
| 96. | warrant | legal authorization to search |
| 97. | weapon | object used to attack |
| 98. | whodunit | mystery about the killer |
| 99. | wiretap | secret phone monitoring |
| 100. | witness | person who saw something |
