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
Samantha Baldwin, 42, and her sons Louis Madge, nine, and Dylan Madge, six, haven't been seen for two days.
A man from Cheshire who had two paedophile manuals explaining how to sexually abuse children without getting caught has been jailed.
UKIP has announced their candidate for the role of Liverpool City Region Mayor. Paula Walters is chairman of UKIP Wirral