Police are trying to trace the mobile phone belonging to a man who died after a fight at a Merseyside pub.
Christopher Shackleton, 42, died from a stroke after the disturbance at the Freshfield Hotel in Formby last month.
A 26-year-old off-duty police officer was arrested and bailed on suspicion of his murder.
Detectives, who believe a member of the public picked up his phone, say it may help the investigation and are urging the person who has it to hand it in.
The phone, a black Nokia, is thought to have been picked up by a member of the public, who texted his widow Sarah Shackleton saying they had found it.
Since she received the message she has been unable to get back in touch with its sender.
Det Ch Insp Lol Forrest, who is leading the inquiry, said: "This has been a devastating incident for Mr Shackleton's wife and his family to deal with.
"To have received a text message from her husband's phone after his death, albeit a very well-intentioned one, would have been heartbreaking.
"This person has done the decent thing and tried to reunite the phone with its rightful owner, however this person has not returned Mrs Shackleton's calls or a text message we sent from Merseyside Police."
He added: "I would appeal to this person to finish the decent thing they started and hand this phone in to the police.
"They are not in any trouble, it is just important that we trace everything Mr Shackleton had in his possession before he died so that we can investigate this tragic death thoroughly and properly."