Father and son found dead at home
Police were conducting more tests on Friday to find out what happened to a man found dead with his young son.
Chris Hall, thought to have been in his 50s, was discovered with six-year-old son Chris at their home in Poole, Dorset, on Wednesday.
A family friend said Mr Hall had been going through an acrimonious split with his partner and feared losing custody of the child.
Post-mortem tests on the pair - known as Big Chris and Little Chris - failed to establish how they died.
A Dorset Police spokesman said: "Further inquiries and analysis are being undertaken to help establish cause of death."
No-one else was being sought in connection with the discovery in Queen's Road, the force said.
Neighbour and friend Phil Haley, 38, said Mr Hall had been incredibly upset by the split with partner Rachel Edwards.
He added that Mr Hall had also been experiencing "legal problems" with the cafe he ran with Ms Edwards at Nuffield Industrial Estate in Poole.
"He doted on his little boy, he meant everything to him. He was a lovely little boy, it's absolutely tragic, I don't know how they are going to explain it to the other kids at the school," Mr Haley said.
He said that Ms Edwards left Mr Hall in March or April this year, and that Mr Hall was distraught at the prospect of losing his son.