On the 17th August 2016, an investigation was commenced into the death of Ryan Albert Frederick Merna, born on the 19th November 1986. The investigation concluded at the end of the Inquest on the 29th March 2022. The Medical Cause of Death was: la Stab wounds to the chest and abdomen The conclusion of the Inquest recorded that Ryan Albert Frederick Merna was unlawfully killed in circumstances where the perpetrator was under the care of mental health services and there was a missed opportunity to reassess the risk the perpetrator posed to others in light of new information disclosed 5 days before Mr Merna's death.

Mr Merna died from injuries sustained in a knife attack at his home address on 14/8/16. On the 8th August 2017 the perpetrator of the assault was convicted at Winchester Crown Court of the offence of Manslaughter on the grounds of Diminished Responsibility. The perpetrator was being treated as an outpatient under the care of the Dorset Forensic Team from May 2016 until Mr Merna's death. His treating psychiatrist saw him in person on 3 occasions on 26/5/16, 29/6/16 and 10/8/16. He was seen regularly by outpatient support in the form of a Care Coordinator and a Forensic Social Worker. The Forensic Social Worker was trying to find suitable accommodation as the perpetrator was of no fixed abode. On 9/8/16 the Forensic Social Worker accompanied the perpetrator to an assessment meeting at a possible housing provider. During the course of that meeting the perpetrator disclosed that he was in possession of a knife, that he was sleeping rough and he needed the knife for his own protection. On 10/8/16 there was a Care Programme Meeting at which the Psychiatrist, Care Coordinator, Social Worker and perpetrator were all present. One of the purposes of the meeting was for the team to raise any significant developments so that a risk assessment could be made. The disclosures made at the housing assessment on 9/8/16 were neither documented at the time nor raised during the CPA meeting on 10/8/16.