According to German detective Josef Resch, a whistleblower has come forward with information about the fatal 2014 crash of Malaysia Airlines Flight MH17 in Ukraine. The information makes the source eligible for a reward of $47 million.

While Western powers have strongly claimed that pro-Russian forces shot the flight with a BUK surface-to-air missile, there has not been any conclusive evidence to support that. According to the Kremlin, it was the Ukrainian military that shot down the Boeing passenger jet carrying 298 people.

Al Arabiya reported that the anonymous source revealed that pro-Russian forces had shot Flight MH17 with a missile in Ukraine. It also reported that the source told the German investigator that the separatists had mistaken the flight for a military aircraft.

Resch, head of Wifka, the company investigating the crash, has refused to name his source, however. Nor has he revealed the exact information the source provided. According to the German private investigator, a mysterious client hired him in 2014 to find out the truth behind the crash. The flight crashed in July 2014 and killed 298 people on board.

However, Resch said he would not be able to reveal the information provided by the source because he was restricted by a nondisclosure agreement. He also said that he was unaware of the identity of his client. According to him, the dealing was done through a Swiss agent.

“Our clients have got the information they wanted to get, so my job is finished,” the Telegraph quoted the detective as saying. “I have a request: that my client makes the information public.” Neverthless, he added that he feared that the information might never be made public as the situation would be “handled internally.”

The bounty is considered to be one of the largest in history. The United States offered around $25 million for information about Al Qaeda mastermind Osama bin Laden. Resch claimed that his client had paid the entire amount to the anonymous source.