Ivan Oberhansli said his son Luke , 17 , was 'all over the place , devastated ' Girlfriend Becky , 16 , went missing from her Bristol home on February 19 . Massive search conducted but her body parts were found earlier this week . Stepbrother Nathan Matthews charged with murder of missing teenager . Shauna Hoare , 21 , charged with attempting to pervert course of justice . Karl Demetrius , Three , Donovan Demetrius , also Three , Jaydene Parsons , 23 , and James Ireland , 23 , accused of assisting an offender in murder case .
Ivan Oberhansli said his son Luke , 17 , was 'all over the place , devastated ' Girlfriend Becky , 16 , went missing from her Bristol home on February 19 . Massive search conducted but her body parts were found earlier this week . Stepbrother Nathan Matthews charged with murder of missing teenager . Shauna Hoare , 21 , charged with attempting to pervert course of justice . Karl Demetrius , 29 , Donovan Demetrius , also 29 , Jaydene Parsons , 23 , and James Ireland , 23 , accused of assisting an offender in murder case .