Four more people have been charged in connection with the investigation into the murder of Becky Watts.
Karl Demetrius, 29, Donovan Demetrius, also 29, Jaydene Parsons, 23 - all of Barton Court, Bristol - and James Ireland, 23, of Richmond Villas, Avonmouth, have all been charged with assisting an offender.
They have been remanded in custody and are due to appear before Bristol Magistrates' Court this afternoon, police said.
A fifth person, a 23-year-old man who was arrested on Monday, has been released without charge.
Nathan Matthews, 28, the stepbrother of 16-year-old Becky - was charged with her murder earlier this week.
Matthews' girlfriend, Shauna Hoare, 21, is accused of perverting the course of justice.
Rachael Scott, head of the Crown Prosecution Service South West Complex Casework Unit, said: "Having carefully reviewed all the evidence presented to me by Avon and Somerset Police, I have today authorised them to charge Karl Demetrius, Jaydene Parsons, Donavon Demetrius and James Ireland with assisting an offender.
"The defendants remain in custody and are due before Bristol Magistrates' Court this afternoon."