A girl named Mary was killed at around 6：20 p. m. on a rainy day. Somebody found her on a street and called the police. The next day, the police got four suspects(犯罪嫌疑人). The police asked them the same question, "What were you doing at around 6：20 p. m. yesterday？"
| Suspect A Name：Lucy Job：A student Relationship：Friends "I was doing my homework in the classroom from six to seven. Several other classmates were in the classroom, too. " |
| Suspect B Name：Miss Green Job：The owner of a barbershop Relationship：Neighbors "A young man was cutting his hair in my shop. He left at 7：50 p. m. Then I closed the shop and went back home. " |
| Suspect C Name：Bob Job：A worker in a factory Relationship：Mary's exboyfriend(前男友) "I didn't kill her. I was a few kilometers away from the street she died on. " |
| Suspect D Name：John Job：A cook Relationship：He is a very bad young man. He is mad at Mary. "I was playing computer games with my friends. We didn't stop playing until midnight. " |
Information Card
| The time Mary was killed |
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| The thing that Lucy was doing when Mary was killed |
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| Miss Green's job |
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| The persons John stayed with at that time |
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| The address where Mary died |
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