Detectives investigating the disappearance and murder of County Down woman Lisa Dorrian, have today made a further arrest.
The 25 year old was last seen alive at a caravan party in Ballyhalbert 21 years ago - and her body has never been found.
A 40-year-old man's been arrested in Millisle on suspicion of assisting offenders and withholding information.
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A man and woman were recently arrested on suspicion of offences including murder - but were later released on bail.
