A 21-year-old man has been arrested on suspicion of murder following the death of father-of-two Stephen Walsh.
Mr Walsh, 37, was found dead at his home in Blenheim Avenue, Mapperley, at around 5.55am on Monday.
He had been assaulted at his home the previous night shortly after being involved in a crash in Newstead Avenue, Mapperley, and leaving the scene.
He suffered serious head injuries in the assault.
Officers have recovered a silver Vauxhall Astra for forensic examination as part of the investigation.
Detectives would still like to hear from anyone who witnessed the collision or anyone who saw anything suspicious in Blenheim Avenue at around the time of the assault.
Call Nottinghamshire Police on 101 or Crimestoppers anonymously on 0800 555 111, quoting incident number 100 of July 30, 2018.