The Wiltshire coroner says the cause of 3 year old Bryn Anderson's death is unclear but has recorded a verdict of unlawful killing.
The bodies of 11 year old Jack and 3 year old Bryn were found next to the body of their father, Graham Anderson, in a flat in Tidworth in September last year.
The coroner earlier recorded a verdict of suicide into the death of Graham Anderson. He said 11 year old Jack was also unlawfully killed by his father.
More top news
Volunteers are needed to save toads trying to cross busy roads. Thousands in the wild come out of hibernation to find breeding ponds.
Junior doctors across the West begin a second 24 hour strike at 8am this morning. The row centres on a disagreement over new contracts.
This is the pinnacle day of the week for the weather. More sunshine and fewer showers - ideal weather did you say?