man has been launched after being questioned by detectives investigating the tried homicide of Detective Chief Inspector John Caldwell, in reference to the declare of accountability made after the assault.
The person, 23, was arrested in Londonderry below the Terrorism Act on Thursday and brought to Musgrave critical crime suite in Belfast for questioning.
He was later launched.
A PSNI spokesman mentioned: “A file will now be submitted to the Public Prosecution Service.
“The investigation continues.”
Mr Caldwell was shot a quantity of instances in entrance of his son at a sports activities complicated in Omagh, Co Tyrone, in February.
The detective, who had investigated plenty of high-profile homicide instances, spent a number of weeks in intensive care.
A typed message, purportedly from the New IRA, was posted on a wall in Derry and mentioned the group was answerable for the taking pictures.
Police have mentioned the New IRA is the primary line of inquiry within the investigation.
Quite a lot of individuals have beforehand appeared in court docket charged in connection together with his tried homicide and on expenses across the declare of accountability.