Go to living room, look at the newspaper (there is an information about Matt) and open the door to hallway. Talk to Marconi and pay him.
Leave the building, Sergeant Kramer calls Randal. Talk with the bum in the alley about everything. A new location will be unlocked (Clayton's Cave).
Go to Matt's place. Talk with Sally and then go to the kitchen. After conversation with Kramer read the suicide note. Talk with Ned or Ted and again with the Kramer. If you try to take something or look inside the fridge, Kramer won't allow you to do that.
Leave the kitchen and Matt's place and go to subway. Choose pawn shop, where you can chat with Mel. The ring was sold, but you need to know who bought it.
Go to Clayton's Cave. Try to pick up a white cue ball, but you can't do this until father Roy is here. Talk with Ryan, you will know his favourite cocktail drink.
Go to the bar and order this cocktail (Daiquirized Royal Mai Tai Iced Tea). Say that is for father Ryan. Give the drink to Ryan. It's too weak. Take a bowl with some corn left in it.
Go to Matt's apartment. Open the cupboard on the left side of the window and take a rat poison. Near the fridge you will find a matchbox.
Now go to the pawn shop. Before you enter the shop look at the pipe, you will get a rotten lemon. Go inside, take an empty bottle (on the gas cylinder). Put the bowl with some corn left in it on the base and use the matches with the gas cylinder. Take a bowl with popcorn.
Go to Randal's apartment. Use the stairs to get on the roof. There is a beer bong, which you can't take because of hungry pigeons. Feed them with popcorn combined with rat poison. Take the beer bong (you will get a funnel and a tube).
Here you can unlock the achievement 'Three meals a day' but only if you feed the pigeons with corn, then with popcorn and finally with poisoned popcorn.
Go to Randal's flat. In the bathroom fill empty bottle with water by using a faucet (you can do this also in Matt's kitchen). Take a TV remote from the couch in the living room.
Come back to the pub and put inside the drink the following ingredients: one of the two batteries taking from the TV remote, the rotten lemon, the rat poison and the rusty razorblade. Now take the white cue ball.
Go to pawn shop. Put the bottle filled with water on the gas cylinder base. Use the tube with the bottle of water and put the second end of the tube into the hole of the clock. Use the white cue ball with cannon.
Open the notebook and find who bought Matt's ring (RMB). It was Charlie, who is familiar to Randal. Go to Charlie Comics by using subway.