The man accused of murdering Patricia Goodband has denied killing her.
Christopher Symons, of Thackeray End, Aylesbury appeared at Reading Crown Court yesterday to enter his plea.
The 63 year old will now face a trial by jury.
Kathleen Adams, 74, of Princes Risborough, also appeared in court and pleaded not guilty to a charge of perverting the course of justice.
A third defendant, Jennifer Creasey, 72, of Benson, also denied charges made against her.
She is accused of perverting the course of justice and assisting an offender.
All three will now by tried together, with the trial expected to start in Reading on September 30.
Also appearing in court yesterday was former Aylesbury Town Council worker Robert Taft, of Kings Close, Westcott.
The 59 year old pleaded guilty to a charge of perverting the course of justice.
He was subsequently granted bail on the condition he surrender his travel documents.
A date for Taft’s sentencing has not yet been set.
Grandmother-of-two Ms Goodband’s body was found in the grounds of her home in Woodham, near Waddesdon on January 21.
A post-mortem examination found she died from head injuries.