Gardaí in Co Westmeath say they want to speak to an unidentified man who was seen with pensioner Christy Hanley in the hours before his violent death last week.
The 83-year-old, who is being laid to rest today, was found dead at his home in Kilbeggan last Thursday morning following an anonymous phonecall.
He is believed to have suffered a number of injuries during a robbery the previous night.
Gardaí investigating the case say they want to speak to a man seen with Mr Hanley last Wednesday afternoon.
He is described as between 30 and 40 years of age, wearing light-blue denims, with a blue track-suit top, a blue baseball cap and carrying a blue rucksack.