ran a ., ▁he ▁was ▁def ended ▁by ▁B urt se v , ▁but ▁B urt se v ▁claims ▁that ▁he ▁was ▁prevent ed ▁from ▁raising ▁his ▁susp ic ions ▁about ▁H ack el man ▁by ▁other ▁high - level ▁revolution aries . ▁H ack el man ▁then ▁moved ▁to ▁R iga ▁where ▁he ▁continued ▁to ▁sp y ▁on ▁members ▁of ▁Narod n aya ▁Vol ya , ▁leading ▁to ▁further ▁arr ests . ▁When ▁susp ic ions ▁about ▁his ▁invol vement ▁with ▁Ok h ran a ▁intens ified , ▁he ▁fled ▁abroad . ▁ ▁Agent ▁of ▁Paris ▁Ok h ran a ▁ ▁H ack el man ▁then ▁settled ▁in ▁Switzerland ▁and ▁en rolled ▁in ▁E TH ▁Zürich ▁under ▁an ▁assumed ▁name ▁Landes en . ▁Under ▁this ▁name ▁he ▁res umed ▁his ▁contacts ▁with ▁Russian ▁revolution aries ▁who ▁were ▁prepar ing ▁bomb s ▁to ▁be ▁sent ▁to ▁Russia . ▁In ▁ 1 8 8 5 , ▁he ▁was ▁rec ru ited ▁by ▁Paris ▁Ok h ran a , ▁Ok h ran a ' s ▁for egin ▁service ▁based ▁in ▁Paris ▁under ▁its ▁first ▁head ▁Peter ▁Rach kov sky . ▁Landes en ▁first ▁sp ied ▁on ▁revolution aries ▁in ▁Switzerland ▁despite ▁persistent ▁susp ic ions ▁of ▁co operation ▁with ▁the ▁police . ▁In ▁ 1 8 9 0 ▁he ▁moved ▁to ▁Paris ▁and ▁continued ▁to ▁sp y ▁on ▁Russian ▁revolution aries ▁based ▁in ▁France . ▁The ▁most ▁high ▁profile ▁operation ▁of ▁Landes en ▁in ▁Paris ▁was ▁an ▁elaborate ▁prov ocation ▁to ▁expose ▁a ▁number ▁of