After investigation, the police found the location of Qiu Wanmo's injury. It was on a wall about 50 meters from her home. There was blood on a protruding stone, which matched the wound on her head. It was basically determined that she was injured after hitting her head on it.

They later found bloodstains at the base of the wall, which were likely left after the injury.

However, it is clear that she probably thought the wound was not fatal, which is why she went straight home.

The fact that no other evidence was found in the vicinity may be because many people passed by during the day, leaving many footprints, making it impossible to determine whether anyone else was present at the time.

So, there's a puzzling question: why did she bump into the wall, and why didn't she want her parents to know? And why didn't she want to go to the hospital?

...

After Su He and his team took over, they saw the testimonies of Qiu's parents. In their view, their daughter was innocent, kind, and gentle, and had no enemies, so they suspected that it was her boyfriend, Shen Hao, who had attacked her.

Because her daughter went out with Shen Hao that day, but she was injured when she came back, it seemed to be related to him.

So Su He and the others investigated Shen Hao as well.

Shen Hao is 22 years old this year. He comes from a well-off family and is very outstanding. He is currently a secretary in the government and has a promising future. Moreover, his colleagues at work speak highly of him and do not seem like the kind of person who would do such a thing.

I don't understand why Mr. and Mrs. Qiu suspect him.

Regardless of the circumstances, as the person who had the most contact with Qiu Wanmo that day, they still interrogated Shen Hao.

Shen Hao was quite cooperative, and it was clear that he was also very saddened by his partner's passing; he looked rather haggard.

He answered all of Su He's and the others' questions without reservation.

"My parents introduced me to Comrade Qiu. We were together for less than a month, met about four or five times, and only had two dates alone."

This time, we went to see a movie in the morning, had lunch at a state-run restaurant, and originally planned to go for a walk in the park in the afternoon, but I saw that she was dressed a little lightly and was worried that she would get cold, so I took her to the department store instead.

But after walking around for a while and seeing that she wasn't very interested, I asked her if there was anything she wanted to do. She said no, she wanted to go home, so I took her home.

Su He interrupted, "You said you took her home this afternoon? Around what time?"

"Around three o'clock."

Did you take her home? Did you meet her family?

"No, I walked her downstairs, but she said she could go up by herself. I didn't have any gifts with me, and it wouldn't be right to come empty-handed, so I left first."

After a moment of silence, Su He continued, "Did Qiu Wanmo go upstairs when you left?"

“Yes, I left after she went upstairs.”

After listening, Su He pondered, "Are there any witnesses to what you're saying?"

Shen Hao paused for a moment, "Someone should have seen me when I took her home that day. After that, I went to the library to read and didn't leave until it was dark and closed. Someone should have seen me during that time, but I don't know if they count as witnesses."

Su He nodded, "Yes, but only if we can find these people to come forward as witnesses."

Shen Hao was stunned after hearing this, and then asked, "So Wanmo was really murdered?"

Su He shook her head. "Not necessarily, but we have to rule out the possibility of homicide."

After hearing this, Shen Hao sighed, "If so, I hope the murderer can be caught as soon as possible."