William Jones had been looking for his former girlfriend and her new partner when he kicked the door of Mr Lewis' flat in Claude Road, in the Roath area of Cardiff, in the early hours of 28 April 2012.
Mr Lewis came to the front door and was stabbed, later dying of his injuries in hospital. The pensioner had a learning difficulty and a number of physical impairments, including blindness in one eye and arthritis.
More top news
Swansea are out of the FA Cup after losing to Tottenham
Runners looking to compete in the Newport half marathon have been disappointed again after it was cancelled due to weather warnings.
Very cold and windy. Some sunny breaks but plenty of snow showers feeding in the from the east.