"We will continue a thorough investigation to bring everything to light."

It has been described as the most thorough investigation of the case.

Clearly, a thorough investigation is needed to look at such questions and to test the police account of the events.

"I did a thorough investigation and found out that the building was in great financial shape," she said.

Billy's students would have to run a thorough investigation if they wanted to find out.

The mayor should stand up for justice, and let a thorough investigation take its course.

But a more thorough investigation, if one were called for, might point toward a likely suspect.

"Clearly the president is not interested in a complete and thorough investigation."

I call for a more thorough investigation by the Commission into this.

Before it does so, we must have a full and thorough investigation of the facts.