The writers forget that Betazoids are supposed to be telepathic, not simply empathic. Sabin should have been able to read the minds of those being questioned to get at the whole truth.
Admiral Satie: Just because there was no sabotage, doesn't mean there isn't a conspiracy on this ship.
Picard: Have we become so fearful, have we become so cowardly, that we must extinguish a man because he carries the blood of a current enemy?
Picard: With the first link, the chain is forged. The first speech censored, the first thought forbidden, the first freedom denied, chains us all irrevocably.
Picard: Mister Worf, villains who twirl their mustaches are easy to spot. Those who clothe themselves in good deeds are well-camouflaged.
Worf: I think after yesterday, people will not be so ready to trust her.
Picard: Maybe. But she or someone like her will always be with us, waiting for the right climate in which to flourish, spreading fear in the name of righteousness. Vigilance, Mr. Worf. That is the price we have to continually pay.