He has been known to use various identities and hairstyles. He may, for example, bleach his hair.
He is suspected of the murder of the 31-year-old Yi Gu, who was heavily pregnant at the time. She was strangled in Haarlem in November 2004.
Jian Xia was recognized when he used the victim's bank card. He was last seen in Antwerp in 2004.