'Of course not me.' She was calm. She vomited smoke rings and smiled, 'I have nothing to do with Stella. Why should I kill her?'

'Then I have nothing to do with you either. Why do you want to help me?' Grace asked back.

'Wolfgang told me to do that.' She said, 'Grace, since Wolfgang is willing to help you, you can take the evidence and go back to your job. Then the nurse will plead guilty and Grace family will not be able to send you to prison.'

'In this case, wouldn't it be wrong to that nurse?' Grace frowned.

'How do you know if she killed people or...