A more thorough explanation:

Definition: A legislative investigation is a formal inquiry conducted by a legislative body as part of its legislative authority. This means that a legislature has the power to investigate matters related to its legislative duties, such as the creation of laws and oversight of government agencies.

For example, a legislative body may conduct an investigation into allegations of corruption within a government agency or the misuse of public funds. During the investigation, the legislature has the power to subpoena witnesses and documents, cross-examine witnesses, and hold witnesses in contempt if they refuse to cooperate.

Another example of a legislative investigation is the impeachment process. In the United States, the House of Representatives has the power to impeach a government official, such as the President, for "high crimes and misdemeanors." This process involves a formal investigation by the House Judiciary Committee, which may include the subpoenaing of witnesses and documents.

These examples illustrate how a legislative investigation is a powerful tool that allows a legislature to fulfill its duties and hold government officials accountable for their actions.