I've looked into some cases and found no real proof of anything.

But yesterday the professor found no proof to support the old stories.

We have thus far found no proof of life, so it's still something to examine.

And the sooner she found proof against him, the better.

But even the scientists themselves acknowledge that they have found no final proof.

The police have found no proof of his involvement in the robbery.

We found tragic proof of this on the most bitter 1 March for many years.

They found proof a hundred leagues further and twelve days later.

There they had found proof of the aliens' intellectual status.