The former Chinese student given immunity from prosecution in Auckland's body-in-a-suitcase trial will begin giving evidence today.
Yin Lianda was originally charged with being an accessory to murder following the death of Wan Biao last year.
But he was granted immunity from prosecution provided he gave evidence againstCui Xiang Xin, Li Zheng and Wang Yuxi.
Cui, Li and Wang, all 22, are charged with kidnapping and murdering Mr Wan, whose body was found in a suitcase on Waitemata Harbour on Good Friday last year.
The Crown says Cui and Li intended to kidnap Mr Wan for ransom and then murder him, and that Wang knew of their plan and helped them by booking an Auckland hotel room for the crime to be committed and bringing goods to them when in the room.
Mr Yin was expected to give evidence yesterday but was delayed as evidence from forensic scientist Jayshree Patel continued.
Mr Yin's evidence is expected to last at least two days.
Ms Patel said some objects found in the suitcase which she helped analyse contained DNA which matched the DNA profile of Cui.
Some of this was obtained by the relatively new Low Copy Number (LCN) testing technique, a technique which Ms Patel was questioned about under cross-examination by Cui's lawyer John Corby.
Ms Patel said she was confident the LCN technique was accurate and that correct testing procedures were followed.
The trial before Justice John Priestley and a jury has been going for eight days and is expected to last at least another two weeks.
