Reporter’s Notebook: Islamic State Murders in Syria’s al-Hol Camp

Most of the women we meet in al-Hol camp, a detention center in northeastern Syria, won’t talk about the murders. But Umm Mustafa, from Iraq, speaks quickly and quietly, standing away from the crowds in the market.

She voices shock.

It is not the roughly 80 killings so far this year in al-Hol that she finds shocking, but the people who have been arrested. Those believed to be...