Although Rose had a lot of things to take from Aunty Hannah's cottage, she had to obey the police order because she didn't want to be a suspect.
Clara's Father had pleaded to be an anonymous person in the investigation so the press won't be aware that he was her brother. Rose almost wanted to fight him but changed her mind when she knew that Aunty Hannah had told her how selfish her brother was.
The investigation has already started. The person on the ID card wasn't able to accomplice because he never resumed work after the murder.
The investigation showed that the person was one of Aunty Hanna's husband's brothers. They intensified the search for his house but still, they couldn't find him.