Yes, that article still exist on the net. I also got this one... The Plane Crash Conspiracy Theory That Explains Poland
.... that Germany has made a deal with the Russians to partition Poland or even that the current Law and Justice government
Well, in any case I am pretty sure that dobri brat Lach was assassinated. He got himself killed just after he criticized NATO and PM Tusk of his own government during session at UNGA. I am sure that NATO and EU never forgave him for he gave them middle finger for what they done to Serbia, in strategic region such is Balkan.
No Russians didn`t killed him. No sense in it. Lech started to coordinate with Serbs and then traveled to Russia to heal relations with Russians. To me, it pretty much looks to me like usual (historical) Serbian mediation between Poland and Russia. Then Lech responded by turning policy of Poland and made closer ties with Serbia. Then he traveled to Russia and then suddenly died. Seams that NATO and EU killed him.