#gathering evidence

• Investigation — The act of systematically investigating a problem, an offense, or a situation of public interest, and its result; a set of investigations, hearings, and evidence gathering carried out by a judicial authority, an administrative commission, or by journalists to establish factual truth and identify responsible parties.
• Inquirer — A person officially tasked with conducting an inquiry; an investigator or official inquirer appointed by a public authority or a special commission to collect evidence, hear individuals, and compile a report regarding an administrative, disciplinary, or criminal case.