Flowers have been laid outside the house of Vincent Kershaw, 85, who was found battered to death in Rochdale.
Greater Manchester Police say they're treating the motive as robbery.
Detectives say Mr Kershaw was carrying a large amount of cash with him, possibly as much as £3000, shortly before he died.
No arrests have been made and police are continuing to investigate.
Click here for more on this story.
More top news
Emma Jesson brings you Saturday's forecast for the North West.
Former Rugby League player Tony Barrow has been diagnosed with an aggressive brain tumour.
Alton Towers rollercoaster crash victim Vicky Balch has posted an 'inspired' first picture since losing her right leg.