A FOURTH man has been arrested as cops continue to probe the murder of nine-year-old Olivia Pratt-Korbel.
The 34-year-old, from Liverpool, is being quizzed by cops on suspicion of assisting an offender.
He was stopped by police while driving on the M42 near Leamington Spa last night with his car seized by officers.
The latest arrest comes hours after a 34-year-old man from Liverpool was arrested on suspicion of murder and attempted murder.
A second man, 41, from Knowsley, was earlier arrested on suspicion of assisting an offender. Both remain in custody.
Police are also quizzing a 29-year-old man on suspicion of assisting an offender.
Olivia was gunned down by a balaclava-clad man in her own home in Knotty Ash, Liverpool, on August 22.
Two men – 36 and 33 – previously arrested on suspicion of murder and two counts of attempted murder have been bailed.
The 36-year-old has been recalled to prison after breaching the terms of his licence.
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.
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“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.”
On the night of the horror, Olivia’s mum Cheryl is believed to have opened the front door to investigate a commotion outside when a gunman forced his way through in pursuit of convicted burglar Joseph Nee.
The shooter then began peppering the home with bullets – hitting Cheryl first then Olivia, who was standing behind her mum.
Tragically, Olivia was declared dead shortly after, while her mother was treated for a gunshot wound to the wrist.
Intended target Nee received medical attention for multiple wounds to his upper body.
The “cold-blooded” killer was caught on CCTV running away from the property moments after the horror.
Head of Investigations Mark Kameen said it is believed he was carrying two guns.
It was previously thought just one firearm had been used – with cops still searching for the weapons.
The gunman was wearing a black hooded jacket, black balaclava with black gloves and black trainers with distinctive white soles, police said.
Anyone with information is urged to contact Merseyside Police, or call Crimestoppers anonymously on 0800 555 111.