The heated discussion took place on ABC's "This Week" show on Sunday when host George Stephanopoulos started asking the mogul about President Putin’s policy.
Question after question – on Russia's alleged desire for world domination, relations with Iran, Ukraine – and finally, Stephanopoulos decided to play the Politkovskaya murder card.
“There are many allegations he was behind the killing of Anna Politkovskaya,” Stephanopoulos said. Politkovskaya, a prominent investigative journalist and human rights activist, was killed on October 7, 2006.
He even quoted a tweet from Obama's Republican rival in 2012, Mitt Romney, who wrote: “Important distinction: thug Putin kills journalists and opponents; our presidents kill terrorists and enemy combatants.”
“But, in all fairness to Putin, you’re saying he killed people, I haven’t seen that. I don’t know that he has. Have you been able to prove that?” Trump said, sharply.
The US presidential candidate admitted that it would have been “despicable” if Putin were really implicated, but he hasn’t seen “any evidence that he’s killed anybody in terms of reporters.”
“It’s never been proven that he’s killed anybody. So, you know, you’re supposed to be innocent until proven guilty, at least in our country,” Trump added.
The ABC host referred to numerous “allegations.”
“I’m saying when you say a man has killed reporters, I’d like you to prove it,” Trump argued. “And I’m saying it would be a terrible thing if it were true. But I have never seen any information or any proof that he killed reporters.”
In fact, "our country does plenty of killing," Trump added, referring to the United States. When he was asked to clarify his phrase, he lashed out at another presidential candidate – Hilary Clinton.
"I think Hillary Clinton, when she was secretary of state, made some horrible, horrible decisions, and thousands and thousands and even hundreds of thousands of people have been killed. Take a look at what we're doing in the Middle East. We went into Iraq, we shouldn't have."