An ambulance-service call brought police to a home in Dersingham shortly after 2.20am on Sunday, 4 October. A woman in her forties was pronounced dead. By that evening, Norfolk Constabulary had announced a murder investigation.

The force said a man, also in his forties, had been arrested on suspicion of murder and taken for questioning at King’s Lynn Police Investigation Centre. That describes an arrest, not a finding that he caused the woman’s death.

Detectives said they were still establishing the circumstances. Their statement scheduled a post-mortem examination for Monday, 5 October. ITV Anglia’s Monday report corroborated the arrest and the planned examination; neither source reviewed here supplies its result.

The next verified development matters more than speculation. This account does not infer a relationship between the people involved, a motive or a cause of death. No charge or court outcome has been established from the sources checked.

People with relevant information can use the reporting route in the Norfolk Police release, quoting incident 27 of 4 October 2026. This briefing was checked on 5 October; its principal source was published the previous evening.