Tonight, the programme examines a baffling murder case: pensioner Ron Cousins had lived in the same Chelmsford house since he was born and was well known by everyone in the area. On 15 April this year, the day he died, he had been seen several times, shopping and having lunch at the local church. He was last seen alive at 6 o'clock watering his garden. The police want to hear from anyone who can add any more details to the case. In particular they are anxious to trace the young man with long blonde hair who was spotted close to Ron's house earlier that day.