"You have no empathy for your fellow man, and you clearly have no idea what love is," Anthony Maslin said in a post directed at President Trump.
Military officer Oleg Ivannikov's unusual voice helped investigators pinpoint him as a key suspect.
The families of the dead have published an emotional open letter.
Vladyslav Voloshyn, 29, killed himself at his home on Sunday.
International investigators reported on Wednesday that a Russian missile downed the jet.
The Ministry of Foreign Affairs said Moscow is the only credible source of information.
Investigators told the victims' families that the rocket was fired from rebel-held ground.
Investigators are said to be looking at a wide range of possible suspects.
If his theory is correct, investigators may be looking in the wrong search area.
Digital forensics prove that Russian-backed separatists brought down the Boeing 777 over eastern Ukraine.
In a press conference held today, investigators said that those on board were likely to have died instantly.
The Dutch Safety Board is expected to say it was downed by a Russian-made Buk missile but not say who was responsible for firing it.
The speaker of parliament called a proposed tribunal into MH17 a "political provocation."
Sergey Naryshkin said that the bombings were not founded on humanitarian considerations or military necessity.
Putin's Security Council veto shows how isolated Moscow has become one year after the MH17 tragedy.
Russia continues to reject a U.N.-backed tribunal.
The plane was able to land safely.
The amount they received was undisclosed.
"It is most likely that Flight MH17 was destroyed in mid-air by the impact of a 9M38M1 surface-to-air missile."
The remains of 296 of 298 of those on board have been identified.
Netherlands increases spending for first time in decade after MH17 and Russian ties worsen