Oleg Zhukovsky, who handled deals with major clients in the timber industry, had been tied up and tortured, business daily Kommersant reported on Friday citing investigators.
A 'suicide note' found in the house read: "I am tired of living. I ask you not to blame anyone." Handwriting experts are ascertaining who penned the note.
The paper said investigators found evidence that the house, in the elite Lesnaya Opushka community in the Odintsovo District, to the west of the capital, had been broken into, and that a plastic bag had been put over Zhukovsky's head. The banker was known to have heart trouble, and may have died while being tortured, investigators said.
However, a high-ranking investigation source told RIA Novosti that suicide was still being considered as a possible cause of death.