Other students have also been interviewed, some making statements that Engleby is homosexual, which doesn't tally up for the investigating officers. His alibi fails to stand up but no concrete evidence against him is found and the investigation is suspended.
Several other pupils were interviewed, and some made claims about Engleby being gay, which didn't match up with what the investigators discovered. Although his defense was unconvincing, no solid evidence was uncovered to incriminate him, resulting in the suspension of the inquiry.