Brenda I'm very sorry to hear about your friend. She is amongst many who haven't been served well by our justice system. A tragic end to her life.
Yes, 'not proven' is one step forward if they should ever adopt it.
Petallus the first rule is never to assume anything in dealing with sexual offending. It's a matter of recognising evidence. Patterns of behaviour, corroboration from unconnected sources, grading of reliability of evidence, number and quality of witnesses and claimants, past and present lifestyle and associates that cause concern, previous and current attitudes and a wide range of other factors that all combine to determine whether prosecution should be attempted. What gets reported in the tabloids doesn't go anywhere near providing convincing information. Claimants who can give good evidence in the run up to a trial may make very poor witnesses when it counts, and lawyers often take miscalculated risks about submitting or withdrawing evidence that can bring a case to its knees.
Please don't assume that anyone who queries the process and outcome of a court case makes assumptions that everyone must be guilty even if acquitted. There is a busy court of appeal that overturns wrongful convictions when trials go wrong, but not to overturn acquittals. It's interesting to read how acquitted cases get reported - some are clear cut about the innocence of the defendant and other reports are sufficiently vague to make one think the press were not convinced, either.