I'm assuming you were in I Corps. Do you know where "Son Thang 4 . . . hamlet" is in relation to Danang or any other major city?
I was in I Corps with the Army from Nov 69 to Nov 70 on my 2nd tour. The incident involving Green would have happened when I was based out of Hue, Phu Bai. In April, I believe, we moved to Marble Mountain when the Army took over control of I Corps from the III MAF. Have to admit I didn't know anything about it then or when the Courts-Martial took place.