Good Samaritan's final good deed hasn't gone unnoticed

A Queensland grandfather who was killed after intervening in an alleged domestic violence attack has given the gift of life through his untimely death.

Norman Olsen, 65, was able to perform one last good deed when his liver was donated to a sick stranger at the same hospital the Vietnam veteran later passed away in.

Olsen was taken to a Brisbane hospital in a critical condition after an alleged one-punch attack by James Darren David Callow, 22.

"They said there was a man who was desperately in need of a liver transplant and if he didn't have it within 24 hours, he wouldn't live to see another day," Olsen’s daughter Kate said.

Since news of Mr Olsen's fatal selfless act made headlines on February 23, friends and strangers have applauded him as a man who paid the ultimate price to help a stranger.

"He'd say, 'I am not a hero, that's what any decent bloke would do'. And that would be his exact words, 'that's what any decent bloke would do'," Ms Olsen told A Current Affair.

Detective Sergeant Paul McCusker has praised Mr Olsen's act of bravery.

"In this instance, he's come forward to help a person in distress and I think he must be commended for that," Detective Sergeant McCusker said.

"People will intervene, people help each other, it's in our nature to help each other."