▁with ▁revol vers ▁and ▁machine ▁guns ▁on ▁the ▁un ar med ▁surv iv ors ▁after ▁the ▁s inking ▁of ▁U B - 1 1 0 . ▁During ▁the ▁en su ing ▁mass acre , ▁Für br inger ▁watched ▁the ▁sk ull ▁of ▁an ▁ 1 8 - year ▁old ▁member ▁of ▁his ▁crew ▁being ▁split ▁open ▁by ▁a ▁l ump ▁of ▁coal ▁hur led ▁by ▁a ▁Royal ▁Navy ▁sail or . ▁When ▁Für br inger ▁attempted ▁to ▁help ▁a ▁wounded ▁officer ▁to ▁sw im , ▁he ▁was ▁told , ▁" Let ▁me ▁die ▁in ▁peace . ▁The ▁sw ine ▁are ▁going ▁to ▁murder ▁us ▁any how ." ▁The ▁shooting ▁only ▁ceased ▁when ▁the ▁con voy ▁the ▁destroy er ▁had ▁been ▁esc ort ing ▁and ▁which ▁contained ▁many ▁neutral - flag ged ▁ships , ▁arrived ▁on ▁scene . ▁He ▁later ▁re called , ▁" As ▁if ▁by ▁magic ▁the ▁British ▁now ▁let ▁down ▁some ▁life ▁boats ▁into ▁the ▁water ." ▁If ▁ ▁Für br inger ' s ▁accus ations ▁were ▁true , ▁the ▁Gar ry ''' s ▁command ing ▁officer , ▁Lieutenant ▁Commander ▁Light ol ler , ▁committed ▁a ▁war ▁crime ▁under ▁the ▁H ague ▁Convention ▁of ▁ 1 9 0 7 , ▁which ▁explicitly ▁forb ade ▁any ▁killing ▁of ▁un ar med ▁ship w reck ▁surv iv ors . ▁▁ 2 1 ▁out ▁of ▁ 3 4 ▁crew ▁members ▁were ▁killed ▁during ▁the ▁s inking ▁and ▁alleg ed ▁mass cre , ▁and ▁Für br inger ▁was ▁captured . ▁He ▁spent ▁the ▁rest ▁of