A fourth man was arrested on Sunday in connection with the murder of nine-year-old Olivia Pratt-Korbel.
The man, from Liverpool, was stopped almost 130 miles away from the city on the M42. He was driving on the motorway when arrested by police and the car he was in was seized.
The 34-year-old has been arrested on suspicion of assisting an offender on September, Sunday, 4, and he is in police custody.