Inspector Zhang took back the list. "Excellent," he said. "We shall go up and talk to her. Just one more thing, Mr. Lau. Do you happen to know if she works in the airport."
Mr. Lau nodded. "Yes, she does."
Inspector Zhang smiled to himself and walked to the elevators. Sergeant Lee followed. They rode up to the tenth floor in silence.
Inspector Zhang knocked on the door to Miss Yu’s apartment. A pretty Chinese woman in a dark business suit opened the door.
"Miss Yu?" asked Inspector Zhang.
"Yes," she said. "What do you want?"
Inspector Zhang showed her his warrant card and identified himself, then introduced Sergeant Lee. Miss Yu looked at her watch. "I’m going to work," she said.
"The airport?"
"That’s right. What is this about?"
"We’re asking residents about the girl who died the other day," said Inspector Zhang. "Can we come in?"
"I really am in a hurry," she said.
"It is important, and we won’t take up too much of your time."
Miss Yu sighed and let them in. The apartment was large with a balcony overlooking the river. The furniture was Italian and there was a huge television dominating one wall. "You have a lovely home, Miss Yu," said Inspector Zhang.
"Thank you."
"And you live here alone?"
Miss Yu nodded and looked pointedly at her watch again.
"What is it you do at the airport?" asked Inspector Zhang. "It must pay well for you to be able to avoid a beautiful apartment such as this."
"My parents bought it for me," said Miss Yu tersely. "You said this was about the girl who killed herself?"
"Yes, were you in the building when it happened?"
"What time was that?"
"Just before ten o’clock."
Miss Yu nodded. "I was at home, yes."
"Alone?"
"Of course, alone."
"And did Mrs. Wong press the buzzer for your flat?"
"Mrs. Wong? Who is Mrs. Wong?"
"I’m sorry," said Inspector Zhang. "She is the lady who died."
"Why do you think she pressed my buzzer?"
"She needed to get access to the roof and she didn’t have a keycard so someone must have admitted her," said Inspector Zhang.
"No one pressed my buzzer all night. I got home from work, I cooked myself dinner, I watched television and I was in bed by eleven."
Sergeant Lee scribbled in her notebook. "I wonder if I might ask you a favour, Miss Yu?" said Inspector Zhang.
"A favour?" She looked at her watch impatiently.
"My wife and I are thinking of moving to this area, would you mind showing me around?"
"You want me to give you a tour of my apartment?"
"That’s so kind of you," said Inspector Zhang, heading for a door at the far end of the sitting room. "Is this the bedroom?"
"One of the bedrooms," said Miss Yu, hurrying after him. "Inspector Zhang, I really have to go to work."
Inspector Zhang nodded appreciatively at the spacious bedroom. There was a king size bed and a sofa against one wall, and another large balcony. There were sliding mirrored doors at the far end of the room and Inspector Zhang slid them back. "A walk-in closet," he said. "That’s what my wife really wants, a closet that she can walk into."
"Please, Inspector…" said Miss Yu. "Really, I have to go."
Inspector Zhang stepped into the closet and ran his hand along a line of dresses. He pulled out a black dress and looked at the label. "Karen Millen," he said. "I was telling Sergeant Lee that my wife is a big fan of Karen Millen’s designs." He put the dress back on the rail and pulled out another one. "I see you have a lot of her dresses. And that you like black. My wife prefers red."
"Inspector Zhang, I really don’t see what the content of my closet has to do with you."
The inspector walked out of the closet and went into the bathroom. The walls and floors were lined with marble and there was a large bath in the centre of the room, big enough for two people. "Is that a Jacuzzi?" asked Inspector Zhang. "My wife has always wanted a Jacuzzi."
"Yes, it’s a Jacuzzi. Please, Inspector Zhang, I have to go to work."
"I expect it’s a wonderful way to relax, after a hard day at work," said Inspector Zhang.
There was a white cabinet to the left of the sink and Inspector Zhang went over and opened it. It was full of medical supplies and he pulled out a pack of sticking plasters.
"I really must protest at this intrusion into my privacy," said Miss Yu. "I am going to have to ask you to leave."
Inspector Zhang put the pack of plasters back into the cabinet and closed the door. "I think we’ve seen all that we need, Miss Yu."
"I’m glad to hear that," said Miss Yu, folding her arms. "I really do have to get to work."
"There is just one more thing," said the inspector. He lowered his chin and looked at her over the top of his spectacles. "I am arresting you for the murder of Mrs. Celia Wong."
Miss Yu’s jaw dropped, and Sergeant Lee looked equally astonished.
They drove Miss Yu to CID headquarters at New Bridge Road, processed her, and then drove out to the airport where they met up with two uniformed policemen.
They found Mr. Wong sitting at a computer in the baggage handling control room, sitting at a computer terminal. He saw them walk into the room and got up from his seat. "What’s wrong?" he asked.
"We’re here to arrest you for the murder of your wife," said Inspector Zhang.
"Nonsense," said Mr. Wong. "I was at home when she died."
"No, you were at home when she fell from the roof," said Inspector Zhang. "Your mistress Shirley Yu pushed her off the roof after first standing on the edge and pretending to be her. She wore a similar Karen Millen dress and at that distance no one could see her face. Then she pushed your wife’s body off. But you were in Miss Yu’s apartment earlier. And that is where you killed your wife. You drowned her in the bath."
"Sheer fantasy," said Mr. Wong.
"I’m afraid we have Miss Yu in custody already, and she has told us everything."
Mr. Wong’s shoulders slumped. His legs started to shake and he sat down heavily. "It was an accident," he said. "I didn’t mean to kill her."
"Your wife found out that you were having an affair?" said Inspector Zhang.
"She must have done. She must have found the key and copied it, and then followed me to the apartment."
"And she used the key to let herself in?"
Wong nodded. "Shirley and I were in the bath. Together. Celia burst in with a knife."
"She was angry?"
Wong laughed sharply. "She was like a woman possessed. I’d never seen her so angry. She came at Shirley with the knife, trying to stab her. I tried to take the knife from her and she cut me." He held up his hand. "The blood just seemed to make her crazier. She kept trying to stab me, saying that I’d ruined her life and that she was going to kill me."
"So you pushed her under the water?"
Wong shook his head. "I didn’t mean to kill her, but it was the only way I could stop her. She fell into the bath and I knelt on her and tried to pull the knife away but she kept struggling. Then suddenly she went still."
"And Miss Yu, what was she doing while this was going on?"
"She was hysterical," said Wong. She was sitting on the floor, crying and shaking. It wasn’t her fault, inspector. Shirley didn’t do anything wrong."
"She covered up a murder, Mr. Wong," said Inspector Zhang quietly.
"We had no choice," said Mr. Wong.
"And the key? The key that your wife used to let herself into the apartment. You took it?"
"She must have been planning it for ages because she had made a copy of the key I used. And last night I couldn’t find my keycard to get into the building. Celia had taken it. She followed me to the building and then used the keycard to get in and the key to get into the apartment."
"And after she was dead, you took the key and the keycard?"