Since July 20 , 2010 , Macierewicz is the Chairman of the Parliamentary Committee for the Investigation of the Causes of the 2010 Polish Air Force Tu-154 crash , commonly known as the Macierewicz Commission . Established on July 8 , 2010 , its goal is to prepare a full account of the circumstances surrounding the crash , which killed President of Poland Lech Kaczyński and his wife Maria , and 94 other dignitaries en route to the 70th anniversary commemorations of the Katyń massacre . The committee was also mandated to provide recommendations regarding the prevention of aviation accidents and incidents . The committee was created in accordance with parliamentary legislation . It issues reports and hears extensive testimony from experts . On June 29 – 30 , 2011 the committee published " Biała Księga Smoleńskiej Tragedii " ( '' White Book of Smolensk Tragedy '' ) , where some 170,000 documents were published on their websites and 19 causes of the crash presented . As the state investigation moved to exhumation of President Kaczyński 's and others ' bodies in late 2016 , the '' New York Times '' summarized that " Macierewicz claimed over the years to have ' irrefutable evidence ' of explosives having caused the crash , but his experts have yet to produce it . " Since November 23 , 2013 , Macierewicz has been the Deputy Leader of Law and Justice , the largest party in the Parliament of Poland
2010 Polish Air Force Tu-154 crash
2010 Polish Air Force Tu-154 crash
Antoni Macierewicz