There is now "sufficient evidence for a realistic prospect of conviction" of PC Alex MacFarlane, a Crown Prosecution Service review concluded.
Lawyers studied footage appearing to show the officer say to a 21-year-old black man: "The problem with you is you will always be a n*****, yeah?".
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Abbas Edalat, a professor in computer science and maths at Imperial College London, has reportedly been held in custody since April 15.
There's been a sharp rise too in rape, burglary and robbery have during what police "busy and challenging time".
Police are looking for a man caught on a security camera before sentimental jewellery and perfume was taken from a pensioner's home.