Digger points to bullet hole in a skull unearthed at Jurf Al-Sakhr mass burial site; INFORCE team offer to train diggers identify forensic evidence; Jaber Al-Hussein led diggers to the Al-Muhawwil burial site; Karim Al-Hussein holds his father's ID card as he searches for his nine missing relatives; workers load remains of more than 3,000 bodies recently unearthed from Jurn Al-Sakhr site photos: Nyier Abdou