In episode four, Kevin and Bob meet at Konor's residence, Connor tells them to go to Su Xi Mu (Chinese Mafia Leader) and asks them to get cocaine.
Bob and Kevin leave, but at that moment Connor calls Dennis to come and tell him he's lost cocaine. Dennis is furious and asks Connor to find him cocaine in a week or break his contract.
After Su Xi Mu, he tells Bob and Kevin that he can get it within three days. At exactly 9pm, Mike goes to Bob's house to pick her up. He goes there kills the guards, sets the dynamites to hide the bodies and runs away. By then Bob had come and died in the blast.