The thief was finding it hard to tell his delusions from reality.

A thief would find a ladder and tools very useful to break into your house.

The thief found an opening in the crowd and dashed off.

What thief would find his way to the Stone-pits on such a night as this?

Even so, expensive models are generally taken less often, partly because thieves find it hard to get to them.

Even an experienced thief will find occasion to learn new tricks if he lives long enough.

Does it mean do you think that the thieves had found the key?

The thieves find a locked mine shaft door in the back of the park.

The thief had not found the object he was looking for.

But the thief may find it difficult to cash in, at least on the open market, because the incident has received so much notice.