A man who was arrested in connection with the murder of Ashley Dale in Liverpool has been released on bail.
The 28-year-old council worker died after gunman burst through her front door on Leinster Road, in Old Swan, and opened fire on Sunday, 21 August.
Merseyside Police say Ms Dale was not believed to have been the intended target, although detectives think the gunman was targeting her address for "unknown reasons".
A 27-year-old man from Dovecot was arrested on suspicion of murder and possession of a firearm on Wednesday, 31 August.
He has since been bailed pending further enquiries.
Two other people - a man and a woman - who were arrested in connection with her murder have also been bailed until a later date.
Detective Chief Inspector Cath Cummings said: "Although progress is being made, I’d still like to urge anyone with information who has yet to come forward to do so as soon as possible.
"From extensive ongoing CCTV enquiries, we do know there were people walking close to the scene at the time of the offence.
"If this was you or someone you know, please come forward as you may, without realising, hold vital information to assist this investigation.
"I would continue to ask taxi and delivery drivers if they were driving in the area between 12:20am and 12:40am and have dash cam footage to please contact us."
She continued to say: "Help us find justice for Ashley’s family, and for a community devastated by her loss."
Officers were called to an address in Leinster Road just after midnight on Sunday, 21 August, following reports of concern for a woman at the property.
Miss Dale was found with gunshot wounds to the body in the rear garden of the house and died a short time later.
Detective Chief Superintendent Mark Kameen has described the shooter as forcing open the front door and firing "multiple-shots indiscriminately".