"impartial inquiry" is a correct and usable phrase in written English.
You may use it when you want to describe a type of investigation that is conducted with no bias or prejudice. For example, "The board of directors launched an impartial inquiry into the financial mismanagement of the company."
Speaking to Israel's Army Radio, he called for an impartial inquiry.
There must now be an impartial inquiry whose integrity is beyond doubt.
"They will either apologise or acknowledge an international, impartial inquiry and its conclusion.
Like Kent in "King Lear", he admires impartial inquiry: he reckons his duty is to speak truth to power.
"An independent, impartial inquiry that is distanced from the interests of those at war must be carried out.
Amnesty International has urged the NTC to carry out "a full, independent and impartial inquiry to establish the circumstances of Colonel Gaddafi's death".
Human Rights Watch investigated three Israeli attacks that raise particular concern about Israel's targeting decisions and require independent and impartial inquiries to determine whether the attacks violated the laws of war.
In other words, after choking down untold gallons of poisoned water, Flint residents will be expected to swallow a torrent of politicized doublespeak masquerading as an impartial official inquiry.
Half those affected already live in exile, but the fate of the others, some of whom appear to have been singled out because of Iranian ancestry, remains unclear.Last year, Bahrain's rulers appeared to open a door to compromise by accepting, with reservations, the rulings of an impartial international inquiry that they had invited.
He explained: "The whole object of impartial public inquiry is to get at the truth, to expose fault where fault is proven to exist, and in all cases to see to it so far as humanly possible that the same mistake, whether it arise through fault or any other reason, is not made in the future.
Government will remain unchecked and unbalanced until judges reject such unwarranted judicial deference and embrace judicial engagement -- conscientious, impartial judicial inquiry into whether the government is pursuing constitutionally proper ends through means that are necessary to accomplish those ends.
