Carlo Giannini was found dead in Manor Fields Park, Sheffield at 5am on Thursday 12 May.
A post-mortem later concluded that he died of a stab wound.
Six months of investigations, CCTV trawls, witness appeals and evidence gathering are yet to identify what happened that morning, and how he came to receive that stab wound.
It is believed the 34-year-old entered the park at 01.08 that morning, but his movements up until his death are unknown.
And six months on, his family have made a plea from their home in Italy to help find answers after being left with “a piece of them missing”. They have also provided two new images of Carlo to go with their plea. The second shows them enjoying a family meal with a man they say was “full of life”.
They said: “Carlo has a family whose heart has been broken and left with a piece of them missing.
“Carlo deserves to rest in peace and, along with justice, this is the minimum we can give to him after his life was taken from him. Because no-one has the right to kill.”
Senior Investigating Officer, DCI Becky Hodgman, said: “It’s still absolutely essential we build up a clear picture of the activity in and around the park on the morning of 12 May.
“Somebody out there knows something that will help the Giannini family get some answers. This is your chance to come forward and help them.”
So far, two people have been arrested in connection with Mr Giannini’s death, both on suspicion of murder. A 17-year-old male will face no further action, and an 18-year-old man remains on bail.
And the Giannini family added: “If anyone saw something on the night between 11 and 12 May 2022 please go to the police.
“It might help give Carlo some dignity.”
If you have any information which could assist detectives , please contact 101 quoting incident number 122 of 12 May. You can also pass information directly to the incident room via https:///mipp.police.uk/operation/14SY22K04-PO2
Alternatively, you can stay completely anonymous by contacting the independent charity Crimestoppers via their website Crimestoppers-uk.org or by calling their UK Contact Centre on 0800 555 111.
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