Police are looking for a man who attacked a street performer dressed as the movie character, Predator, in Birmingham city centre.
Images captured on a mobile phone show a young man running up behind the performer and pushing them from a podium in front of numerous onlookers.
The incident took place at the Bullring shopping centre on Sunday.
More top news
A major crime review team raised concerns around the initial investigation, and the document was "a trigger" for the Surrey Police probe.
Darren Sanders admitted he was careless when he hit Vera and George Maskell while he was driving at just 12mph last July.
Several former managers have emerged as early favourites be become Derby's new head coach by the start of next season.