He was never indicted because the authorities could not prove that he had been at the murder scene.

To win prosecution, authorities must prove a link between a suspect and an act of terrorist crime.

This time the authorities proved less responsive to his pleas.

And in the case of Asia, that authority could prove counterproductive.

Or, if by some chance they did, the authorities could not really prove anything.

In this case, however, the authorities would prove to be correct.

Your own authorities with one unanimous voice will prove you stupid.

Thus, the authorities have proved unable to relieve the kind of social pressure that spawned Solidarity in the first place.

Under current law, the authorities must prove intent, she said.

Those who chose not to appear before the commission would face criminal prosecution if the authorities could prove their guilt.