His investigation hadn't turned up any information about a sister.

Or would the investigation turn up the people behind it?

He said that if the investigation turned up evidence of neglect on anyone's part, "we'll take it from there."

Of course, as was later admitted, these investigations turned up nothing.

The investigation went on for months, but nothing ever turned up.

Nobody saw her go, but an investigation has turned up two facts.

An investigation turned up the image among her bed linen and she was arrested.

The investigation into his murder never turned up any leads.

The investigation hasn't turned up anything that'd change our mind.

"Should these investigations turn up a lot, it's possible we could drop the case," the official said.