I can't be certain what they meant, but security agents and police will often find themselves in a situation where they need to decide how to devote investigati

I can't be certain what they meant, but security agents and police will often find themselves in a situation where they need to decide how to devote investigative resources in situations where they have limited information. The information they do have might depend on their assessment of the veracity of what they are being told. In that case they may well have only their judgement to go on. I think that's reasonable, what else are they going to do? What we need to be careful of is making judgements about innocence or guilt based on subjective opinion.