The commission's investigation failed to find any wrongdoing by the banks involved, which were not named.

Official investigations at the time failed to hold any specific prison staff accountable.

But he added that without her voluntary cooperation the investigation would fail.

An investigation by the police failed to produce any charges.

But subsequent investigations have so far failed to tie him to the operation.

But so far the investigations have failed to show who ordered the murder.

The official investigation failed to turn up a conviction for the crime.

A second October 1997 private investigation also failed to reveal any large violations.

Yet extensive investigations have failed to turn up a cause for the clusters.

Sometimes investigation fails and he simply does something provocative to crack open the case.