On the flight back to Sharkey's house I was watching the blurry landscape moving below the helicopter. I was at a loss as to who it was that was threatening him. As Rebecca quite rightly pointed out, he should have no shortage of people wanting to rub him out. But how many of those would know to use Rivers' name?
I wondered how I was going to get this resolved by the time Sharkey's daughter's wedding came around. The only way to draw the killer out was to set Sharkey up as an easy target.
Maybe that was my answer...