Interesting programme's on bbc2 recently,managed to catch up on i player last night,its called real csi,it follows a csi unit looking at forensics,the last one followed a case of rape,the victim alleged penetration and oral,a guy was captured on cctv wearing a addidas coat and trainers with a flash strip on the back.A suspect was pulled in but he had disposed of the clothes,these were subsequently found but no dna of the girl was found on them.Now the really interesting and fascinating part for me was,digital forensics,they had his phone but he said he couldn't remember the unlock code,not a problem sir,they delivered it their digital forensics unit,who connected it up to some soft ware and its unlocked in seconds,depending on the size of storage, (this phone was 32gb) it would take 24 hrs to download the info,including what you think you delete,thats left there to be traced.Any how not long after the time of the rape he been looking at how long do finger prints last,previously how to rape a white girl,it all added to circumstantial evidence and at the plea hearing once presented with the evidence he pleaded guilty.