The mother of a businessman found dead at his Wolverhampton home last year has issued an emotional plea for help to track his killer.
The body of 43-year-old Michael Davis-Bingham, originally from Canada, was discovered at his house in Bowen Street on December 13. He had died from a single stab wound, police said.
Launching a fresh appeal for information, West Midlands Police said the motive for the killing remains a "mystery".
Mr Davis-Bingham's mother, Reva Davis, said: "We are very saddened by Michael's untimely and tragic death. Whoever you are, you did not only end the life of Michael, but you also robbed his family of a loving son, brother, nephew, uncle and cousin."
Detective Inspector Verley Tyndale said: "Michael was a well-liked and well respected member of the community, and also a prominent figure in business in the region, having worked previously for a local authority and managed his own business in property consultancy."
He said police want to trace a visitor to Mr Davis-Bingham's Park-fields home on the day his body was found.
Mr Davis-Bingham moved to the UK in 2002, living in Telford, Shropshire, before moving to Wolverhampton. He was last seen in Erdington, Birmingham, at about 7.30pm on December 12.
Officers are appealing for anyone who may have seen him, or his Black BMW X5 car after that time. The keys to the car, which was not stolen, have remained missing since Mr Davis-Bingham's death.