Police are urging three "Good Samaritans", who tried to help a dying man they discovered lying on a pavement, to come forward.
Passers-by found Michael Trebilcock, of Winklebury Centre in Basingstoke, on the pavement outside his home in Winklebury at 2140 GMT on Tuesday.
They called an ambulance and the 61-year-old was taken to North Hampshire Hospital where he later died.
Earlier that day, a couple and an elderly man tried to assist him when they discovered him lying on the ground outside the nearby Three Barrels Pub.
Police are now appealing for three people to contact them.