Agree, On-Line...and I'll got further: referring to Philadelphia's much vaunted "victim centred" sexual assault investigation unit, I'd like to know some stats on on all the re-examination of  "2701 shelved cases going back five years ..." in the city. "Six-hundred eighty-one were reclassified as rape, 863 as other sexual offences." (Guardian July 2013, "Investigating rape in Philadelphia) The re-examination, I believe, was conducted by police in conjunction with a third-party intervention--a women's organization. Summary: "unfounded" (shelved) files statistic went way down. 

 BUT:
1. Can't find comments from police nor DA's office on how many of these reclassified cases were actually pursued and,
2. How many charged due to it.
3. A conviction rate on those charged. 
So,  question remains: lower "unfounded file" means what, exactly? 

Yet, this whole system was encouraged by our own Minister of Justice (G&M) Despite what appears to be another kind of "lack of evidence."