According to an info on this site ( I think...or from an other CSI site maybe...), Ray Jnr is looking for his dad, but doesn't know that Ray Sr has alrady met his fate. Does that mean that Ray Sr is dead? I don't get it. Why would tthe show have gone to all this trouble to relive him just to kill him off soon afterwards. This doesn't make sense. The only explanation I could find, is that the show wants to involve Ray Jr more, but he's to young for that, so maybe going through all these emotions will make him mature, and therefore, they will be able to make him behave like a 16-17 boy rather than his real age 14. To be honest, I'm totally lost here 
*edited by mod to add spoiler warning and spoiler code*