It happened around 8:20am in the 12000 block of Claygate at Cork.
Authorities arrived and found James Cavitt with a gunshot wound. He was rushed to an area hospital.
The victim's son, Belangeo Cavitt, said his father and his brother, Scott Cavitt, were arguing when the father grabbed a knife. Scott Cavitt then shot their father in the neck, he said.
"I guess my brother got the upper hand on him this time," Belangeo Cavitt said.
At last check, the father was stable.
Scott Cavitt fled the scene and police are looking for him.
Please stay with Eyewitness News and abc13.com as we continue following this story.