A RUGBY man who believed his partner was having an affair with a colleague turned up at a works party and attacked the other man with a hammer. But Jose De Oliveira Costa avoided being jailed when he appeared in court after pleading guilty to assault and possessing an offensive weapon. De Oliveira Costa, aged 40, of Saunton Road, Rugby, was sentenced to 52 weeks in prison suspended for 18 months. He was also ordered to do 200 hours of unpaid work and to pay £250 compensation to victim Martin Walsh and £340 costs. Prosecutor, Kate Thomas, said Mr Walsh and De Oliveira Costa’s partner Marissa Ferrera both worked at the Marks & Spencer distribution centre in Crick. They were among a group of staff who went to a works ‘do’ at a bowling alley at the Junction One retail park in Rugby at the end of last year. De Oliveira Costa suspected Marissa was having an affair with Mr Walsh, her line manager, although there was nothing factual to base that on. Later that evening Mr Walsh was outside having a cigarette with a colleague when De Oliveira Costa approached them and asked him: “Are you Martin?” De Oliveira Costa asked him if he knew Marissa and then tried to snatch his cigarette from his mouth. Thinking De Oliveira Costa wanted a cigarette, Mr Walsh offered him one from a packet, but he refused the offer and pulled a claw hammer from his pocket.