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.
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 occasions in entrance of his son at a sports activities complicated in Omagh, Co Tyrone, in February.
The detective, who had investigated a lot of high-profile homicide circumstances, 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 chargeable for the taking pictures.
Police have mentioned the New IRA is the principle line of inquiry within the investigation.
Plenty of folks have beforehand appeared in courtroom charged in connection along with his tried homicide and on prices across the declare of accountability.