瑪麗去雜貨店的主因是為了建立一個不在場證明，掩蓋她殺害Patrick的

瑪麗去雜貨店的主因是為了建立一個不在場證明，掩蓋她殺害Patrick的證據。 她要演釋出自己看起來像是去了商店買東西，在Patrick被害期間不是停留在屋子裡，所以她可以假裝自己不知道事情發生經過，及沒有傷害到她的原因。另外，雜貨店的老板與瑪麗的關係良好，老板會和他的顧客聊天，那麼當有警察要調查瑪麗時，老板可以做證人證明她來過雜貨店。

結果 (英文) 1:

Mary is the main reason to go to the grocery store in order to establish an alibi to cover up evidence she was murdered Patrick's. She wants to look like a play release went to the store to buy things, not killed during the Patrick to stay in the house, so she can pretend they do not know what happened after, and did not hurt her cause.
In addition, grocery store owner a good relationship with Mary, his boss and the customer chat, then when the police to investigate Mary, the boss can be a witness to prove that she came to the grocery store.

結果 (英文) 2:

The main reason Mary went to the grocery store was to create an alibi to cover up evidence that she had killed Patrick. She wanted to show that she looked like she had gone to the store to buy something, and that she wasn't in the house during Patrick's murder, so she could pretend she didn't know what had happened and why she hadn't hurt her.
In addition, the grocery store owner has a good relationship with Mary, the boss will chat with his customers, so when there is a police investigation of Mary, the boss can be a witness to prove that she came to the grocery store.

結果 (英文) 3:

The main reason why Mary went to the grocery store was to establish an alibi to cover up the evidence that she killed Patrick. She wanted to act as if she had gone to the store to buy things. She didn't stay in the house during Patrick's murder, so she could pretend that she didn't know what happened and didn't hurt her.
In addition, the boss of the grocery store has a good relationship with Mary. The boss will chat with his customers. Then when there is a policeman to investigate Mary, the boss can be a witness to prove that she has been to the grocery store.