Good move by the USA. The first IDF investigation was a whitewash. It is time for the IDF and Israel to do a credible investigation. Goldstone was not biased. He reported the facts. Israel chose to refuse to cooperate. From all appearances, Israel had much to hide. YouTube videos seem to substatiate some of Goldstone's findings.
Singapore arrests man who tried to join ISIS (Reuters)
from the article: U.S. to Israel: Probe alleged Gaza war crimes to advance peace