A fourth man has been arrested in connection with the murder of nine-year-old Olivia Pratt-Korbel in Liverpool.
The suspect, 34, was stopped on the M42 near Leamington Spa on Sunday evening.
The man, who is from Liverpool, was arrested on suspicion of assisting an offender and is in police custody.
Detective Chief Superintendent and Head of Investigations, Mark Kameen, said: “I continue to urge anyone who has information that can help our investigation into Olivia’s tragic murder to please come forward so we can bring those responsible to justice.
“A number of people have been arrested in respect of this investigation. However, we still need the public’s help in ensuring that we can a build a strong evidential picture so justice is served for Olivia and her family.
“With this, I appeal for those who may have information, no matter how small, that could continue to help our inquiries to contact us directly or anonymously and we will do the rest.”