The Coroner is expected to open an inquest where there is reasonable suspicion that the deceased has died a violent or unnatural death, where the cause of death is unknown or if the deceased died while in custody or state detention as defined by section 1(2) of the Coroners and Justice Act 2009.t is worth noting that the Coroner is under no obligation to hold an inquest solely in the public interest; an inquest will be held by a Coroner if the circumstances of the death fall under those offences listed in paragraph 1(6) of Schedule 1 of the Coroners and Justice Act 2009.