Nottinghamshire Police are investigating a fire at the house where a murder victim used to live.
Keith Frogson, 62, died in a frenzied and apparently unprovoked attack outside his home on Bentinck Street, Annesley Woodhouse on 19 July.
Around 0330 BST on Friday firefighters were called to the Bentinck Street house where it took them about an hour to put out the fire.
The dead man's daughter and son-in-law had to flee through the back door.
An ambulance was sent but nobody was reported to be hurt.
Mr Frogson died from multiple lacerations and a crossbow may have been among the weapons used.
His family believe his killers are local and are being shielded.
On Tuesday, his son, Wayne, begged the local community to come forward with information.