MEERUT, March 12 -- A day after senior Bharatiya Janata Party (BJP) leader Gulfam Singh Yadav died after an unidentified man allegedly injected a poisonous liquid into his stomach in a Sambhal village, police on Tuesday said post-mortem examination could not confirm presence of poison in his body even as an FIR was registered against four named and two unknown people in connection with the crime....