A family gathering over the festive period took a turn for the worse when a man assaulted his partner, smashed a window and injured a police officer. Shane Cross, 29, committed his offences after becoming involved in a Boxing Day argument with various members of his family. They had been drinking alcohol to celebrate the day at a property in West Norfolk, but shortly before 10pm, the mood changed. A disagreement between Cross and his partner resulted in them shouting at each other, and his mother attempted to diffuse the situation. However, while doing so, Cross pushed his partner, causing her…