27 The material facts concerning the conviction for assault, which the respondent admitted, were that on the evening of Friday, 21 June 2002, the respondent and another person attended at the complainant's home in order to confront the complainant's son. The respondent believed that the complainant's son had assaulted a male person at a party some two weeks earlier. On arrival at the house, the respondent and the other person commenced banging on the front door. The complainant opened the door and asked what was wrong. The respondent stood at the door with a rock in his hand and commenced abusing the complainant, demanding that his son come out and fight him. The complainant explained that his son was not at the home and lived in Bunbury. This did not satisfy the respondent, who became more aggressive and, on being told to leave and that the police were being called, punched the complainant once to the mouth, resulting in a cut and bruising to the inside of the complainant's lip. The complainant closed the screen security door when all this occurred, which action resulted in a number of cuts to his hand. The respondent left, stating that he would return. At about 11.30 pm, the respondent and two other persons returned to the complainant's home. The police arrived at the scene shortly thereafter and observed the respondent sitting nearby at a street corner about 20 metres from the complainant's house. He was consuming alcohol with two friends. The respondent was later arrested and charged with common assault.