article_snippet: Karl Demetrius, 29 and Karl Demetrius girlfriend, Jaydene Parsons, 23, allegedly acted to help Matthews evade detection.
article_snippet: Karl's twin Donovan Demetrius and James Ireland, 23, have also been charged with the same offence of assisting in the 'disposal and concealment' of Becky's body parts.
article_snippet: (left) boyfriend, 29-year-old Karl Demetrius (left).
article_snippet: In custody:  Donovan Demetrius (left) has also been charged as has Jamie Ireland (right).
highlights_snippet: Karl Demetrius, 29, Donovan Demetrius, also 29, Jaydene Parsons, 23, and James Ireland, 23, accused of assisting an offender in murder case .