Murderer Shaun Walmsley's escape: Man released after arrest

Shaun Walmsley was one of four men convicted of a murder in 2014

A man arrested by police investigating the escape of a convicted murderer in Liverpool has been released.

Shaun Walmsley, 28, was getting into a cab with prison officers outside Aintree Hospital on Tuesday when he was sprung from custody by two armed men.

Merseyside Police arrested a 25-year-old man from Norris Green on Friday on suspicion of perverting the course of justice.

He has now been released pending further enquiries, police said.

A 27-year-old man and a woman, 26, who were arrested on Thursday on suspicion of assisting an offender were also released on Friday.

Police released CCTV images of the escape, where Walmsley fled in a gold Volvo

Walmsley is one of four men serving life sentences for the "vicious and savage" stabbing of Anthony Duffy in 2014.

Described as "highly dangerous", he was handed a life sentence with a minimum term of 30 years.

The 28-year-old fled from outside Aintree University Hospital in a gold Volvo when two armed men ambushed the taxi after his appointment.

CCTV images were released showing the moment the armed men threatened prison officers.

Police said a number of people in the area may not have realised what was going on during the escape

Detectives said they were working with police forces across the UK and abroad to locate Walmsley, and appealed to members of the public for information.

Officers warned people not to approach the escapee as he, or those with him, may be armed.