Telegram & Gazette A former Southborough man accused of stabbing one of the town’s police sergeants in the back in the police station last June was arraigned Tuesday in Worcester Superior Court, records show. Stuart Angus was arraigned on charges of assault and battery with a dangerous weapon, assault and battery on a police officer and resisting arrest, according to electronic court records. Angus had walked into the station and rambled incoherently, authorities have said, prompting Deluca to call for a mental health evaluation. Angus stabbed Deluca in the back with a folding knife when he turned around, police have said. The knife penetrated a protective vest Deluca was wearing, they said, and the vest prevented serious injury.