kampala foreign victims attack aid workers south sudan begin give testimony via video link unite state wednesday trial government soldier accuse murder gang rape assault terrain hotel south sudan capital juba july 2016 end battle government rebel force leave south sudanese aid worker dead least five foreign women rap testimony one victims video conference prosecution lawyer philips anyang tell reuters without give detail add second victim schedule testify thursday six witness testify unite state assistance fbi military trial juba open media u.n. investigators right group frequently accuse south sudanese army rebel murder torture rape say crimes almost always go unpunished civil war kill tens thousands break 2013 army president salva kiir ethnic dinka rebel former vice president riek machar nuer trial 12 suspect hotel attack first prosecution south sudan soldier accuse commit atrocities stall due lack witness evidence previously court juba demand witness travel south sudan testify unwilling safety confidentiality concern court drop requirement court concede point sign will accept victims concern victims wish lot sensitive one woman rap attack tell reuters trial begin another woman tell reuters trial gang-rape 15 men hotel incident say want testify victims crimes south sudan get justice stand put record atrocities commit force ... amaze opportunity take say also testify least one eyewitness murder south sudanese aid worker john gatluak nuer work u.s.-funded organization internews anyang tell reuters victims south sudan attack aid workers start testify u.s