"Han Kuan, although Locard's exchange principle showed that evidence gradually weakened with the passage of time, it doesn't mean that no evidence is left!" Zhao Yu said calmly.
He then added, "And, there is a more powerful law, which states that nothing is too difficult for people who are willing to do it! For your case, I almost went everywhere that you stayed in Beiqian, Golden City, and Yaoming! I even figured out some things that you didn't even know in those days!"
Zhao Yu then scrolled down on his phone and showed Han Kuan an old document. "Here… Look at this! This is a student donation certificate! The old lady you killed selflessly supported five needy college students by paying for their tuition fees with her savings! You killed such a good person! Is that what you call justice?"
