The man was taken into custody after he shot his 37-year-old cousin in Lurhwayizo village, also on Sunday, said Captain Jackson Manatha.
“The deceased was hit on his upper body and died on the spot.”
Police confiscated the firearm used in the shooting, with it to be sent for ballistic tests to see if it was used in other crimes.
Manatha said the motive for the shooting was unknown at this time. Police were investigating.
The man was expected to appear in the Willowvale Magistrate’s Court on Tuesday, and would also be charged with illegal possession of a firearm, he said.