, ▁" counter - re volution ary ▁speech es ▁against ▁the ▁Soviet ▁system " ▁and ▁being ▁part ▁of ▁a ▁" techn ological ▁counter - re volution ." ▁He ▁was ▁arrested ▁for ▁the ▁final ▁time ▁in ▁ 1 9 2 8 , ▁and ▁in ▁May ▁ 1 9 2 9 ▁the ▁O G PU ▁( for er un ner ▁of ▁the ▁K GB ) ▁sent enced ▁him ▁to ▁death ▁for ▁w reck ing ; ▁that ▁is , ▁attempts ▁to ▁sab ot age ▁Soviet ▁authority ▁through ▁sub standard ▁work . ▁He ▁was ▁shot ▁to ▁death ▁and ▁his ▁execution ▁was ▁announced ▁on ▁ 2 4 ▁May ▁ 1 9 2 9 . ▁He ▁was ▁re h abil itated ▁in ▁ 1 9 9 0 ▁by ▁the ▁Pl enum ▁of ▁the ▁Supreme ▁Court ▁of ▁the ▁USS R . ▁ ▁Family ▁▁ ▁Nikol ai ▁and ▁Anna ▁had ▁six ▁children : ▁ ▁K ira ▁( 1 8 8 5 – 1 9 6 9 ) ▁Andrew ▁( d ied ▁child ) ▁Marc ▁( 1 8 9 0 – - 1 9 1 8 , ▁executed ▁in ▁Om sk ) ▁Gal ina ▁( 1 8 9 1 – 1 9 8 5 , ▁England ) ▁( Author ▁of ▁a ▁book ▁As ▁I ▁remember ▁them , ▁London , ▁ 1 9 7 3 ; ▁transl ator ▁of ▁correspond ence ▁with ▁T cha ik ov sky ▁with ▁family ) ▁Att al ▁( 1 8 9 4 – 1 9 1 6 , ▁died ▁July ▁ 1 5 ▁at ▁his ▁first ▁battle ,