Lincoln murder investigation ends with post-mortem results
The results show the man died of natural causes
Three people arrested in a murder investigation have been released after post-mortem results revealed the victim died of natural causes.
Emergency services were called out to Clifton Street just before 10.30am on Sunday 12th April.
Paramedics arrived to find a 55-year-old man who had died sometime earlier.
Three people, two men, aged 33 and 50 and a woman aged 54, were arrested on suspicion of murder.
They've now been released after a post-mortem revealed the man died of natural causes.