An
inquest into the death was opened by Nicholas Rheinberg at
Warrington Coroner's Court on 5 March 2012. The inquest was
adjourned until an
IPCC investigation was completed. The IPCC concluded its investigation in July 2013, finding that the intelligence gathering under Operation Shire had been 'flawed', criticising the management of the armed police team sent in to apprehend Grainger, and concluding that the officer responsible for shooting Grainger 'may have a case to answer for regarding possible manslaughter'. These results were forwarded to the
Crown Prosecution Service, who have the authority to decide whether or not to pursue a case, and the coroner. Jonathan Bridge, solicitor for Grainger's family, complained that the investigation had been leaked, without being shown to the family. The CPS decided that the armed policeman who fired the shot would not be prosecuted. They decided that it would be unlikely a jury would find him guilty due to perceived threat. A CPS spokesman alleged that
Greater Manchester Police failed to prepare properly for the operation, which left people at risk. Chief Constable
Peter Fahy was charged under
Health and Safety at Work Act as he was the
corporation sole for Greater Manchester Police. The police force faced an unlimited fine if found guilty. who had argued that the disclosure of evidence which needed to be disclosed in open court in order for the defendant (Fahy) to have a fair trial would not be in the public interest and would prejudice future Greater Manchester Police operations. The CPS had no choice but to accept the judge's decision and drop the case against the Greater Manchester Police. ==Public inquiry==