Before Zhao Yu crossed over, he had often engaged in sneak, immoral acts like theft. There was a rule regarding that line of work called "No work during a storm!" Basically, it meant that thieves would not try to infiltrate homes during a storm, especially at night because during a storm, people tended not to sleep well. It was easy to be caught during that time.
In Jian Wenli’s case, it had been pouring rain that day, with lightning and thunder. Any experienced criminal would not pick such a time to act. Zhao Yu’s feeling was the exact opposite of Miao Ying’s. He thought that the person who killed Jian Wenli was an inexperienced amateur!