After a disagreement with his brother, Asa Enoch Grace-Pere damaged his sibling's car and fled from the police.
He has pleaded guilty to escaping lawful custody and wilful damage.
On Tuesday, Whanganui District Court heard that Grace-Pere went to his brother's house in Bell St about 6.40pm on September 16 and demanded money.
He then put two dents in his brother's vehicle as he left the property empty-handed.
The police called Grace-Pere on his cellphone and asked him to return to the house, where they tried to arrest him. But as he was being handcuffed, Grace-Pere "shot the gap", said defence lawyer Harete Hipango.