1.   The hood has been sent for forensic examination and it is hoped it will yield important clues.

2.   And if polite gumshoe tactics yield no clues?

3.   Each puzzle yielded a clue, which in turn sent the team to the location of the next mystery.

4.   Fibers from a crime scene also yield important clues, Dawson said.

5.   Finding the place where the bomb was built would yield fresh clues about who built it and when, and possibly about how many people were involved.

6.   Health officials hope their investigation will yield clues about how cyclospora develops and spreads.

7.   In the hangar, however, the wreckage was not yielding clues of terrorism.

8.   It had not been cleaned since Atta dropped it off and could yield valuable clues.

9.   It may also yield clues as to whether changing the amount of transplanted cells or the location of the transplant could lead to a more successful therapy.