INVESTIGATE

[verb] - to examine (a crime, problem, statement, etc.) carefully, esp. to discover the truthPolice are investigating allegations of corruption and bribery involving senior executives in the company. [T]An individual could also petition the Commission to investigate an alleged breach of the directive. [T]Food chemists have investigated the grain to see if it really does give the benefits claimed. [T]Any merger proposal is bound to be investigated by the Monopolies Commission. [T]We are of course investigating how an error like this could have occurred. [+ wh- word]