russian business partner that you've been shot, you clearly didn't think this was a botched robbery, carjacking. you thought this was related to your work, related to your russian connections? >> well, i don't think there's any doubt. >> someone had tried to kill nem, just like the other guy in -- in london. >> the other guy? a former kgb agent and friend of joyal's killed three months earlier in london, assassinated with a weapon so frightening and exotic, investigators almost missed it, a weapon that raised the specter of state-sponsored murder. coming up, we trace the steps of a mysterious attack from bus to bar to deathbed. >> he was going through unspeakable torment. >> when "dateline" continues. >> when "dateline" continues ed . i can still keep my eyes on the road. ed . my truck doesn't have that. it offers an optional technology package