MP Anton Heraschenko, an adviser to the incumbent Interior Minister Arsen Avakov, wrote this on Facebook.
Kalashnikov was shot dead at the entrance to his flat in Kyiv's Vynohradar district on Wednesday evening. Mass media also reported that Kalashnikov's death had been confirmed by some of his relatives. They also said that he had been receiving threats.
"No doubt the late [MP] knew much about who and how had been financing the Antimaidan [groups of titushkis who got together to counter peaceful protesters during Euromadian events November 2013 through February 2014, which was later called the Revolution of Dignity], which cost [ousted president Viktor] Yanukovych and his gang several million hryvnias per day. He'll take all these secrets away. But not only he alone knew who and how had been financing the Antimaidan," Heraschenko wrote.