Poso Mystery: Stamped Poker

"Captain, we couldn't find Lao Du's sniper rifle. He should have been kidnapped by the murderer, but we found this next to his body." Xie Yunhai took out a stamped poker card from his pocket and handed it to Chen Jun. There was a purple and gold rose pattern printed on the back of the playing card, and the front of the card showed the appearance of a smiling gray clown. However, the card was stained with Du Weifeng's blood, making the clown smile unusually ferocious. Chen Jun looked at the blood-stained kid poker, with an invisible murderous aura bursting out of his eyes. Although Chen Jun and the others often get together to play poker games at home, the brothers all know that Laodu never plays poker, that is to say: This stamped poker was left behind intentionally by the murderer! Provocative! This is the murderer's naked provocation! Who is this murderer? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.