He can't seem to get it through his head that official investigators aren't going to ever really get to the bottom of things.

Once again, he must become an official investigator and make use of his exosociological skills to solve a mystery.

During their other appearances, they serve as the official investigators into whatever crimes Tintin is currently investigating.

Only at that point, said Gisel Lunig, an official investigator, did the driver realize what had happened.

He was also his union's official investigator on many inquiries into airline crashes.

You could call him an official unofficial investigator.

While no longer an official investigator on the case, Smit continued to work on it until his death in 2010.

On 19 May 2004, the official investigators found that managerial incompetence and systems failures were the main cause for the accident.

The decision also reflected a growing wariness in the Senate about testing the rights of reporters to conceal their sources from official investigators.

Being an official investigator entitled him to anything he might care to ask for.