The FBI is reportedly investigating Donald Trump ally and Blackwater founder Erik Prince for his efforts to convert an American-made crop dusting plane into an attack aircraft, in violation of arms trafficking regulations.

The investigation, reported by The Intercept, has been launched as a part of a series of ongoing inquiries into Mr Prince, who is considered by some to be a shadow adviser to the president.

He has reportedly also been the focus of an investigation for lying to Congress during the House Intelligence Committee’s investigation into Russia’s meddling in the 2016 election, as well as concerns related to an armed aviation proposal made to the United Arab Emirates in 2017.

The crop dusting investigation stems from an alleged 2015 attempt to modify the planes, according to two people who spoke to The Intercept.

But Mr Prince, an heir to a billion dollar fortune, is apparently not concerned with investigation and sees himself as untouchable during the Trump administration: “Not under this guy,” he is reported to have said of the prospect that he might be prosecuted.

Palestinian protests against President Trump's Middle East peace plan Show all 18 1 /18 Palestinian protests against President Trump's Middle East peace plan Palestinian protests against President Trump's Middle East peace plan TOPSHOT - Palestinian demonstrators chant slogans and wave Palestinian flags as they stand by flaming tyres during a protest against US President Donald Trump's expected peace plan proposal in Gaza City on January 28, 2020. (Photo by MAHMUD HAMS / AFP) (Photo by MAHMUD HAMS/AFP via Getty Images) MAHMUD HAMS AFP via Getty Palestinian protests against President Trump's Middle East peace plan Palestinian protesters burn pictures of US President Donald Trump and Israel's Prime Minister Benjamin Netanyahu during a demonstration in the West Bank against the expected peace plan proposal AFP via Getty Palestinian protests against President Trump's Middle East peace plan US President and Israeli Prime Minister Benjamin Netanyahu announce Trump's Middle East peace plan in the White House AFP via Getty Palestinian protests against President Trump's Middle East peace plan Palestinians protest as smoke rises from burning tires ahead of the announcement by U.S. President Donald Trump of his long-delayed Mideast peace plan, in Gaza City January 28, 2020. REUTERS/Mohammed Salem TPX IMAGES OF THE DAY MOHAMMED SALEM Reuters Palestinian protests against President Trump's Middle East peace plan Palestinian demonstrators chant slogans as they stand by flaming tyres during a protest against US President Donald Trump's expected peace plan proposal in Rafah in the southern Gaza Strip . - Palestinians staged protests against US President Donald Trump's Middle East peace plan, hours before it was to be unveiled in Washington. Thousands demonstrated in Gaza, burning pictures of Trump and the American flag, while further rallies were planned for the coming days. (Photo by SAID KHATIB / AFP) (Photo by SAID KHATIB/AFP via Getty Images) SAID KHATIB AFP via Getty Palestinian protests against President Trump's Middle East peace plan Palestinian protesters wave the national flag during a demonstration in the West Bank city of Ramallah on January 28, 2020, against US President Donald Trump's expected peace plan proposal. - Palestinians staged protests against US President Donald Trump's Middle East peace plan, hours before it was to be unveiled in Washington. Thousands demonstrated in Gaza, burning pictures of Trump and the American flag, while further rallies were planned for the coming days. (Photo by Ahmad GHARABLI / AFP) (Photo by AHMAD GHARABLI/AFP via Getty Images) AHMAD GHARABLI AFP via Getty Palestinian protests against President Trump's Middle East peace plan U.S. President Donald Trump gives a thumbs up while listening to Israel's Prime Minister Benjamin Netanyahu address a joint news conference to discuss a new Middle East peace plan proposal in the East Room of the White House in Washington, U.S., January 28, 2020. REUTERS/Brendan McDermid BRENDAN MCDERMID Reuters Palestinian protests against President Trump's Middle East peace plan epa08172847 Palestinians chant slogans during a protest against the so-called 'Deal of the Century', planned by Trump to solve the conflict between Palestinians and Israel, in the streets of Gaza City, Gaza Strip, 28 January 2020. EPA/MOHAMMED SABER MOHAMMED SABER EPA Palestinian protests against President Trump's Middle East peace plan epa08172814 A Palestinian holds a banner reading in Arabic 'down with the deal of century' as people protest against the deal planned by Trump to solve the conflict between Palestinians and Israel, in the streets of Gaza City, Gaza Strip, 28 January 2020. EPA/MOHAMMED SABER MOHAMMED SABER EPA Palestinian protests against President Trump's Middle East peace plan Palestinian protesters burn pictures of US President Donald Trump during a demonstration in the West Bank city of Ramallah on January 28, 2020, against the expected peace plan proposal. - Palestinians staged protests against US President Donald Trump's Middle East peace plan, hours before it was to be unveiled in Washington. Thousands demonstrated in Gaza, burning pictures of Trump and the American flag, while further rallies were planned for the coming days. (Photo by Ahmad GHARABLI / AFP) (Photo by AHMAD GHARABLI/AFP via Getty Images) AHMAD GHARABLI AFP via Getty Palestinian protests against President Trump's Middle East peace plan Palestinian protesters wave the national flag during a demonstration in the West Bank city of Ramallah on January 28, 2020, against US President Donald Trump's expected peace plan proposal. - Palestinians staged protests against US President Donald Trump's Middle East peace plan, hours before it was to be unveiled in Washington. Thousands demonstrated in Gaza, burning pictures of Trump and the American flag, while further rallies were planned for the coming days. (Photo by Ahmad GHARABLI / AFP) (Photo by AHMAD GHARABLI/AFP via Getty Images) AHMAD GHARABLI AFP via Getty Palestinian protests against President Trump's Middle East peace plan epa08172866 Palestinians set fire during a protest against the so-called 'Deal of the Century', planned by Trump to solve the conflict between Palestinians and Israel, in the streets of Gaza City, Gaza Strip, 28 January 2020. EPA/MOHAMMED SABER MOHAMMED SABER EPA Palestinian protests against President Trump's Middle East peace plan epa08172871 Palestinians chant slogans during a protest against the so-called 'Deal of the Century', planned by Trump to solve the conflict between Palestinians and Israel, in the streets of Gaza City, Gaza Strip, 28 January 2020. EPA/MOHAMMED SABER MOHAMMED SABER EPA Palestinian protests against President Trump's Middle East peace plan epa08172842 Palestinians protesters burn a poster depicting US President Donald Trump during a protest against the so-called 'Deal of the Century', planned by Trump to solve the conflict between Palestinians and Israel, in the streets of Gaza City, Gaza Strip, 28 January 2020. EPA/MOHAMMED SABER MOHAMMED SABER EPA Palestinian protests against President Trump's Middle East peace plan Palestinian demonstrators chant slogans as they stand by flaming tyres during a protest against US President Donald Trump's expected peace plan proposal in Rafah in the southern Gaza Strip . - Palestinians staged protests against US President Donald Trump's Middle East peace plan, hours before it was to be unveiled in Washington. Thousands demonstrated in Gaza, burning pictures of Trump and the American flag, while further rallies were planned for the coming days. (Photo by SAID KHATIB / AFP) (Photo by SAID KHATIB/AFP via Getty Images) SAID KHATIB AFP via Getty Palestinian protests against President Trump's Middle East peace plan Palestinian protesters wave the national flag and a portrait of president Mahmud Abbas during a demonstration in the West Bank city of Ramallah on January 28, 2020, against US President Donald Trump's expected peace plan proposal. - Palestinians staged protests against US President Donald Trump's Middle East peace plan, hours before it was to be unveiled in Washington. Thousands demonstrated in Gaza, burning pictures of Trump and the American flag, while further rallies were planned for the coming days. (Photo by Ahmad GHARABLI / AFP) (Photo by AHMAD GHARABLI/AFP via Getty Images) AHMAD GHARABLI AFP via Getty Palestinian protests against President Trump's Middle East peace plan Palestinians chant slogans as they demonstrate outside the local government headquarters in Tulkarmm, west of Nablus in the occupied West Bank, on January 28, 2020 against US President Donald Trump's expected peace plan proposal. (Photo by Jaafar ASHTIYEH / AFP) (Photo by JAAFAR ASHTIYEH/AFP via Getty Images) JAAFAR ASHTIYEH AFP via Getty Palestinian protests against President Trump's Middle East peace plan Palestinian protesters chant angry slogans during a protest against the U.S. Mideast peace plan, in Gaza City, Monday, Jan. 28, 2020. U.S. President Donald Trump is set to unveil his administration's much-anticipated Mideast peace plan in the latest U.S. venture to resolve the Israeli-Palestinian conflict. (AP Photo/Khalil Hamra) Khalil Hamra AP

Mr Prince donated at least $250,000 to help elect Mr Trump during the 2016 campaign against Hillary Clinton, and also helped to dig up dirt on the Democrat, according to campaign finance details and the special counsel report on Russian meddling in the election.

Blackwater, the company Mr Prince is best known for, is a private military company that was banned from operations in Iraq after it was discovered that the company’s employees had murdered several civilians there.

Mr Prince, in addition to his giving to Mr Trump, is also connected to the administration because his sister is education secretary Betsy DeVos.