Knifeman admits killing

A Polish man accused of murdering his ex-girlfriend in a frenzied knife attack has confessed to killing her. Grezesiek Kosiec, 23, killed Karolina Chwiluk, 20, at a flat on Dora Street, Limehouse, east London, on 4 May. Miss Chwiluk died at the scene at around 11pm despite the efforts of air ambulance paramedics who battled to save her life. The architecture student suffered 25 stab wounds. Two other people, Monica Fijak and David Czerwiwski, both in their 40s, suffered serious…