A 34-year-old man has been arrested on suspicion of assisting an offender in connection with the murder of Olivia Pratt-Korbel in Liverpool.
The man was stopped by police on the M42 on Sunday evening.
The vehicle he was driving has been seized.
He is the fourth man to have been arrested over the weekend in connection with the death of Olivia, who was shot in her home in Dovecot, Liverpool.
