Detectives have questioned a millionaire former executive over the death of a man at his secluded farmhouse.
Ricci Gallagher, 46, died after being injured at the house in Little Burstead, Essex, earlier this month.
The property in Sudburys Farm Road is owned by Richard Glanville, the ex-chief financial officer for clothes stores Oasis, Warehouse and Coast.
The Essex Police investigation is focusing on what Mr Gallagher was doing in the property.
It is understood one line of inquiry is that Mr Glanville and his gardener may have tried to remove Mr Gallagher from the farmhouse after finding him inside.
A fire at Mr Gallagher's home, roughly half a mile from the murder scene, was reported minutes before he was found injured in the farmhouse on August 6, the force said.
Officers are trying to establish a link between the two incidents.
Mr Gallagher was airlifted to the Royal London Hospital where he died from head injuries.
Detectives are looking to speak to witnesses who may have seen any "suspicious or unusual activity" in the area.
They are particularly keen to trace the drivers of a lorry and a Vauxhall car seen in the area between 9am and 9.30am that day.
The force confirmed two men, aged 59 and 53, were arrested at the scene and have been released on police bail pending further inquiries.
Witnesses should contact Detective Inspector Anne Cameron of Kent and Essex Serious Crime Directorate on 101, email at firstname.lastname@example.org or Crimestoppers anonymously on 0800 555111.