Police also discovered a rifle and ammunition in the back seat of his car. Carrington previously pleaded guilty in Masterton District Court to charges of drink-driving and possession of a firearm while intoxicated.
In court on Monday, his lawyer Virginia Pearson said he'd had a relationship breakdown. "This is a situation where Mr Carrington was not in a very good headspace in his life. "He was under extreme stress and he'd started self medicating."
She said he had pleaded guilty at the earliest opportunity and undertaken drug and alcohol counselling.
Judge Ian Mill said Carrington admitted to police he had been drinking when stopped. "You said you had been drinking and were unsteady on your feet ... you stated to police you thought you were an alcoholic.
"There's no evidence to suggest anything sinister."
Judge Mill said Carrington was spoken very highly of by his employer and had acknowledged he had a problem. "Things got on top of you and you started to drink."
He said Carrington had put himself and the public at risk and he could not afford to come back on another drink driving charge.
Judge Mill convicted and sentenced him to four months' community detention and nine months' supervision on both charges.
He also disqualified him from driving for one year and one day in relation to the drink driving charge and ordered him to pay $354 for medical fees.