The alleged behavior occured several years BEFORE the guy that is being quoted became mall manager. This is a kind of detail that leaps out at you if you are a (former) prosecutor trying to find inconsistencies.
Most people might miss it due to confirmation bias.
Translation: This guy wasn’t there at the relevant times, hence what he is saying can be BOTH a. TRUE (to the best of his knowledge), and b. IRRELEVANT to evaluating the allegations.
He wasn’t banned when the Manager who spoke out came on board in 1981. It follows that he was never banned.