Alan Wood murder: Detectives seek Polish Pawel Wrzyszcz
Detectives investigating a brutal murder which happened almost five years ago have appealed for help to find a man who may hold information.
Alan Wood, 50, was bound and tortured in his home in Lound, near Bourne, Lincolnshire, in October 2009.
Det Supt Stuart Morrison, who has led the investigation from the start, said the force wants to trace Polish national Pawel Wrzyszcz.
He is thought to have lived and worked in the Peterborough area at the time.
Det Supt Morrison said: "I would like to stress that he is not a suspect in this case and we would simply like to talk to him to see if he has any information that may help."
He added: "Our determination to catch Mr Wood's killer has not waned and someone out there could hold a key piece of information to help us bring those responsible to justice."'Most disturbing crime'
Mr Wood, who ran a small gardening business, had no known enemies, according to Lincolnshire Police.
He was subjected to a "brutal and sustained" attack at his home, during which he had his throat cut a number of times and an attempt was made to decapitate him.
Manor Lodge, where Mr Wood lived, was kept as a crime scene for two years but was recently demolished.
The force said despite the use of extraordinary levels of violence, those involved walked away with just a few hundred pounds.
Mr Wood's bank cards were stolen and used in Bourne and nearby Stamford over the following couple of days.
But police said it is still not known why the "most disturbing crime in Lincolnshire in recent history" was committed, apart from a possible financial motive.
The investigation to date has looked at 16,000 possible suspects.