Grain and Maze decided to make their attack that day. They felt that the police had reduced because of other cases they had to handle.
Maze told Grain the intensive unit where Nancy was kept.
They decided that they would do away with her first.
They had seen how doctors went into the room because Grain had come the previous day to monitor activities. Maze had not dared to come in his true form but disguised as a bent old woman.
They had come and monitored things and felt at the end of that day that they had got the information they needed.
So, today was the day they attacked...