Two police constables are under investigation after a video emerged of an officer threatening to "make something up' and arrest a man.The Independent Office for Police Conduct (IOPC) is investigating both of the Lancashire Police for alleged misconduct.Footage was widely shared on social media in April of a confrontation between a police officer and a member of the public in Accrington, Lancashire.The man can be heard claiming to be 'harassed'.The police officer can be seen stepping close to the