A woman arrested by detectives investigating the murder of teenager Jonathan Cairns whose body was found buried in a forest in Ballykelly over 20 years ago has been released on bail pending further enquiries.

The 18-year-old was attacked as he made his way home from a night out in April 1999. His body was found partially buried in a shallow grave in Loughermore Forest.

A man was jailed in 2002 for helping to dispose of the body but no one has ever been charged with Mr Cairn's murder.