Olivia was fatally shot in the chest at her home in Dovecot, Liverpool, on 22 August.

Her mother, Cheryl Korbel, 46, was injured as a gunman chased convicted burglar, Joseph Nee, into their home.

Merseyside Police said a man had been arrested on Friday on suspicion of assisting an offender and was being questioned by detectives.

Thomas Cashman, 34, of West Derby, has been charged with Olivia's murder and will appear in court again next year.

Paul Russell, 40, of West Derby, has been charged with assisting an offender.

Others arrested have been released on police bail pending further inquiries.