... I noticed Layne's article because the idea that Hastings could have been killed over printing bad things a general had to say about a president seems absurd.
Hastings is reported to have been on to what he considered a big story just before he died.
Layne's article is about the possibility that someone had Pat Tillman murdered because Tillman became disillusioned with the real reason for the Afghanistan war and was starting to talk about it. Covering up something like that might be a motive for taking out a journalist.
I have no other info, but just thinking out loud about what sort of story Hastings might have been digging into.