Paul McCauley 'barbecue attack' - two men released
Police have released two men questioned in connection with the attempted murder of a Londonderry civil servant five years ago.
Paul McCauley suffered brain damage when he was attacked by a gang at a barbecue in Derry in 2006.
A 21-year-old man arrested on Thursday has been released on police bail pending further enquiries.
A second supsect, aged 36, was released unconditionally.
In 2009, Daryll Proctor pleaded guilty to grievous bodily harm and was sentenced to 12 years in a young offenders centre.