The British Crown Prosecution Service (CPS) recommended today that no charges be brought against entertainer Michael Barrymore and two other men over the death of Stuart Lubbock.
Mr Lubbock was found dead at Barrymore's Essex home six years ago.
Chris McCann, complex casework lawyer with Essex CPS, said: "I am not satisfied that the prosecution can overcome the objections that are likely to be raised. and so I have decided that there is insufficient evidence for a realistic prospect of conviction against the three individuals."
He added: "There is still no answer in either the scientific or medical evidence how or by whose hand Mr Lubbock died."
Mr Barrymore (55) and the two other men, Justin Merritt and Jonathan Kenny, had returned to Essex police station today to answer further questions after being arrested in June on suspicion of murder and serious sexual assault.
Police were granted a further 12 hours to question Mr Barrymore, but all three men were released from bail at about 2.15pm after the CPS said it would not bring charges.
Mr Barrymore's lawyer has denied allegations his client was involved in the death of Mr Lubbock (31). Postmortem tests indicated the victim had drowned, and an inquest recorded an open verdict on his death.