Further tests are being carried out on the bodies of a man and his six-year-old son who were found dead at their Dorset home.
Chris Hall, who was in his 50s, and his son, also called Chris, were discovered inside the house in Queens Road, Poole, on Wednesday.
Post-mortem examinations were carried out on Thursday but failed to establish the cause of deaths.
Police said no-one else was being sought in connection with the deaths.
A spokesman added: "Further inquiries and analysis are being undertaken to help establish cause of death."
The house was sealed off on Wednesday as forensic tests continued inside the property.
Neighbour and friend Phil Haley, 38, said Mr Hall had been incredibly upset by his 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," Mr Haley said.
Mr Haley, a sales representative for a drinks company, added: "He was a very good man.
"Before people think he was evil, that was the last thing he was. He had a lot of morals, a lot of people liked him."