Three people arrested in connection with the death of a Gorleston man will have no further action taken against them.
Malcolm Pratt, 51, known as Hank, was found collapsed in his home on Exeter Road on July 15 and died on July 26 in Addenbrooke's Hospital, Cambridge.
Two men from Great Yarmouth, aged 30 and 33, and a 31-year-old woman, also from Yarmouth, were arrested on suspicion of conspiracy to murder.
Following a four month investigation, during which the Major Investigation Team reviewed pathology reports and consulted the Crown Prosecution Service, the evidence was not sufficient to take the inquiry forward.
Police have therefore decided that no further action will be taken against these three people.
All have been notified that their bail has been cancelled.
Mr Pratt's family has also been informed.
The death is no longer being treated as murder.
Police are not looking for anyone else in connection with Mr Pratt's death and there are no outstanding lines of inquiry.
A file is being prepared for the coroner for inquest.
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