Dr Konstancja Duff (right), then 24, had intervened in a police stop and search in East London in May 2013 by trying to hand the detainee a card showing him his rights and declining to give her own name. The teenager was later found to be carrying a knife.
Koshka was handcuffed and taken to a police station where she was strip searched, manhandled, groped and held in a cell for 24 hours. On her release, she was charged with both obstruction and assaulting two police officers.
A six-month wait ensued before she was acquitted – the start of an eight-year legal battle to hold the police accountable and during which she uncovered horrifying CCTV footage of her time in custody (left).