Jimmy Marcus is a cocky sack of shit

At this point, Whitey and I have cracked the case. Two kids bumped off Katie Marcus. Dave beat the hell out of, and killed, a guy having sex with a child-aged prostitute. Both of these - awful crimes. I knew that this was a lose-lose situation but it gets better. Whitey and I go to charge Boyle and he is nowhere to be found. Nobody knows where the hell he is, we literally cannot round up this guy. Why? Dave Boyle is dead. Whitey and I have no proof of that, but I have strong reason to know Dave is dead and I feel confident about who is responsible: Jimmy Marcus. Jimmy thought that Dave Boyle killed his daughter. He saw Dave's swollen hand, knew how Katie was beaten and saw the dent in his car. All Jimmy had to do was put all those things together, add a bit of rage over the death of his daughter, plus throw in some emotions over wanting closure, and then he had reason to believe Dave killed his daughter. So, ex-con Jimmy goes ahead and kills this guy. He leaves him never to be found again. I will find Dave Boyle though. Celeste needs me to find Dave; she too knows that Jimmy killed Dave. Celeste told me "He [Jimmy Marcus] killed my husband." When I gestured at Jimmy about it, he smiled. He is a cocky, guiltless son of a bitch, who has murdered two people. Neither of whom killed his daughter. I promised Celeste I would prove he killed Dave and I will follow through on my word. Marcus belongs back in prison and I'll be sure to get him there.