Olivia was fatally shot in the chest at her home in Dovecot, Liverpool, as
a gunman chased another man into her home.
Thomas Cashman, 34, of West Derby, has been charged with her murder and
will appear in court again next year.
Merseyside Police said a man was arrested on Friday on suspicion of
assisting an offender.
He was being questioned by detectives, a spokesman said.
Olivia’s mother, Cheryl Korbel, 46, was injured in the incident on August
22 when a gunman chased convicted burglar Joseph Nee, into their home.
Paul Russell, 40, of West Derby, has been charged with assisting an
offender.
Others arrested have been released on police bail pending further inquiries.
Olivia’s funeral was held on 15 September at a packed St Margaret Mary’s
Church, just streets away from where the shooting happened.

A Man Has Been Arrested In Connection With The Murder Of Nine-year-old Olivia Pratt-Korbel