The son of a man charged with the murder of nurse Rui Li, remains in custody after detectives were granted additional time to question him.
Pierre Legris, 60, will appear before Bournemouth Magistrates' Court on Monday, after he was charged with his wife's murder, Dorset Police said.
Detective Inspector Marcus Hester, of the major crime investigation team, said: "Family Liaison Officers have updated Rui's daughter with these developments - clearly, this is a very difficult time for her as she tries to come to terms with the loss of her mother.
"It is also important to stress - as is typical in such circumstances - that it would be entirely inappropriate for Dorset Police to comment further ahead of the trial. It is vital that the justice system is allowed to follow its course."
More top news
The memorial service will be attended by Prince Harry and Meghan Markle.
David Browning admits manslaughter by diminished responsibility but denies murder.
Four people have died and the suspect is still at large, police said.