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.”
The latest development comes after a 34-year-old man was arrested on suspicion of murder and attempted murder in connection with Olivia’s killing.
Man, 34, arrested on suspicion of murder of Olivia Pratt-Korbel
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Two other men, a 41-year-old from Knowsley and a 29-year-old from Liverpool, are being questioned on suspicion of assisting an offender.
Olivia died after being shot in her home in the Dovecot area of Liverpool when a gunman chased convicted burglar Joseph Nee into the property at about 10pm on Monday 22 August.
Her mother, Cheryl Korbel, was also injured and was receiving treatment for her wounds, police said.