As far as Wu Jun knew about criminal policemen, veteran criminal policemen like Wei Zhenguo, not to mention full of wit and tricks, definitely had quite a lot of methods to solve cases accumulated over the years.

Moreover, Wei Zhenguo must have thought about this arson case, otherwise, he would have just rejected it on the phone, why bother to come to the police dog squadron to meet him. Da Zhuang didn't give him a handjob.

Wei Zhenguo nodded Wu Jun with his hand, and laughed: "Old Wu is more thoughtful, I do have an idea, I think I can try it."