1.   Have you left a clue or have you covered your tracks?

2.   He leaves clues all over the place.

3.   Analyses of the anthrax sample and the chemicals used to coat it could leave telltale clues to the techniques and equipment used to manufacture the germ material.

4.   Again the killer leaves clues, and it is up to Rhyme to decode them, before there is another victim.

5.   But if she knew who adopted Linda, she left no clues.

6.   Elgar left no clues to how he planned to end the symphony.

7.   Even if they leave DNA clues, there may not be matches on any law enforcement database, if they have a clean record.

8.   He has left no clue as to his whereabouts since then.

9.   I spent a lot of time trying to shape the book in a way that would leave clues.