Very Good, the Wife Is Not Suspicious, but his brother is?

"It does seem unlikely," Su Xuan agreed. "He had good relationship with so many people. As for the other two who had some grudges against him, it was nothing more than minor issues. Killing someone over such trivial matters isn't worth it."

However, considering the fingerprint on the victim's ankle, they couldn't just dismiss this as a simple accidental drowning. While all the evidence pointed towards it being an accidental drowning, Su Xuan had a strong feeling that this was a murder case, based on that fingerprint alone.

"This is where Chen Jianguo fell into the river according to the surveillance," Su Xuan said as he reached the riverbank.

Zhou Qiang, who had followed him, found a spot and looked down. In their line of sight, there was indeed a fresh mark on the riverbank, indicating where Chen Jianguo had slipped down. 

"Do you think Chen Jianguo could swim?" Su Xuan suddenly asked, catching Zhou Qiang off guard.