I once had some of my possessions taken by the police as evidence (I won't be talking about on the internet what that was to do with) but, whilst they had my mobile phone a female police officer pretending to be me called numerous people in my contacts offering to sell them drugs. Non of my friends took the bait as I don't sell drugs and wouldn't be stupid enough to talk on the phone about stuff like that and some obviously recognised it wasnt my voice. They showed me their call history, so while it had been deleted from my phone they had indeed received calls from my phone during the three months the police had it in their possession.
Drug dealing was nothing to do with why the police had my possessions as evidence so I have no clue what they thought they were up to. The only conclusion I can come to is that they were trying to claim the money I had in my possession (£200) was ill gotten gains and therefore they could keep it. They deny all knowledge of ever making phone calls using my phone and although this didn't lead to my incarceration I am in no doubt that if my friends weren't as switched on as they are, then I'd have been fucked. ACAB!