Mr Chappelow's body was found under a pile of papers
The jury trying a financial trader accused of murdering a wealthy author has retired to consider its verdict.
Wang Yam is accused of killing recluse Allan Chappelow, 86, in order to steal his identity and plunder his wealth.
Mr Chappelow's badly-beaten body was found under a pile of papers at his home in Hampstead, north London.
Mr Yam, 46, who lives in Denning Road, near the victim's £2.5m home, denies murder, burglary and four dishonesty offences in 2006, the Old Bailey heard.
During the two-month trial jurors heard that Mr Chappelow, an expert on writer George Bernard Shaw, lived alone in the dilapidated property in Downshire Hill.
For a month after the author's body was discovered, a man was stealing his post and using information from it to access bank and credit card accounts.
Prosecutors claimed that Mr Yam murdered the writer because he was in financial difficulty.
Parts of the trial were heard in secret to protect national security and to ensure the administration of justice.