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.
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A new project is aiming to help people with hearing and sight loss leave hospital and live independently at home.
Another dry, bright and cold day with many places seeing some sunshine. However, there may be some fog patches that persist all day.
A dry night across Wales, but it will quickly turn cold this evening with a widespread frost forming, locally severe.