Stilly River Sage: If Condit knew that he didn't have anything to do with Levy's disappearance...He couldn't know that, could he, at that time for she could have comitted suicide with her relation to him being one reason, for instance. That's why he should have told the police at once as several have said here.
Police usually don't ask bluntly when people are missing "do you have murdered XY?" but "do you know of anything which can shed light upon the disappearance of XY?" It is not his task to judge whether the information about an affaire is relevant or not.
Wolfgang