No real information. Motive, did he know him, etc. This will take a few days to sort itself out.........(Edit)......... I just read the shooter knew them and was suffering from PTSD. Kyle and the other victim were supposedly helping him deal with it, when he turned on both of them, and shot them in the back, then fled in Kyle's pickup truck. Again, this is all very early reporting, so don't take any of it to the bank just yet.