Since I fretted here about the dearth of information on the investigation of the Fogel family massacre in Israel, I thought it only fair to post this update. It seems that the Israeli military is in fact making arrests and taking fingerprints and DNA samples from quite a number of people at the "Palestinian" village of Awarta, near Itamar, where the murders took place. Apparently the investigation is being carried out more or less secretly--that is to say, without release of details to the public--by the IDF.
This could mean that the report in WND of the arrest of men from Fatah (hence, plausibly men who had been trained by the U.S.) was correct, though the IDF sweep seems to be trying to catch conspirators as well as for those who actually carried out the murders.
Hmmm. Good luck to the investigators. I still wish they had the d.p. there.