Gulf Harbour body trial: Woman may have been detained in a suitcase before she died

Lanyue Xiao, Kaixiao Liu, an interpreter, Jingui Liu, Xiuyun Li in the Auckland High Court.

Chinese woman Shulai Wang might have been detained in a suitcase found in the defendants' garage before she died, a forensic scientist says.

More evidence has also been heard about a blood-stained foam board found at the defendants' Orewa home.

The body of the 70-year-old was found wrapped in layers of rubbish bags in Gulf Harbour by a fisherman two years ago.

The Crown says Wang came to New Zealand to seek religious instructions from Kaixiao Liu, who along with his wife Lanyue Xiao, mother Xiuyun Li and father Jingui Liu have denied the kidnapping and manslaughter of Wang.