By Q Radio News
The PSNI says it believes it knows who murdered journalist Lyra McKee.
However, the man leading the murder inquiry, Detective Chief Superintendent Raymond Murray told the BBC it was incredibly difficult to prove.
29 year-old Ms. McKee died while observing a riot in the Creggan estate in April last year.
Meanwhile, the Police Ombudsman is investigating a complaint from Lyra’s family concerning the security operation on the day of the killing.

‘Intensive work’ continuing to agree multi-year budget for Northern Ireland
Strength of evidence against man charged with murdering Lyra McKee questioned
Teenage boy arrested over cyber attack on schools’ IT system
Ulster University to cut up to 450 jobs amid funding pressures
Northern Ireland MPs call on Prime Minister to act amid fuel protests