DETECTIVES last night charged a man with two counts of rape and one count of murder in connection with a series of sex attacks in Tuen Mun over the past 16 months. The 22-year-old, Lam Kwok-wai, is being held at Tuen Mun police station in connection with a series of sex attacks during that time and will appear in Tuen Mun magistracy tomorrow morning. Lam had earlier been taken to a number of housing estates in the New Territories town by Regional Crime Unit (RCU) detectives in a reconstruction of a number of the cases. He was arrested late on Thursday night by police officers in To Kwa Wan in connection with another alleged sex attack. The case was transferred to the New Territories North RCU on Friday as part of the investigation into the Tuen Mun sex attacks and murders. Lam, who is single, had been held at Tai Po police station before yesterday afternoon's reconstruction. Hundreds of Tuen Mun residents turned out to watch detectives take Lam back to the scenes of the crimes, the first of which occurred on April 24 last year, in Yau Oi Estate. The suspect, whose head was covered by a black bag, was driven from Tai Po police station with detectives to the high-rise housing estates with his hands secured to a waist chain. He was first taken to Yau Oi Estate - where three of the attacks took place - yesterday afternoon, and then to Tuen Mun police station for questioning. Lam was then escorted by detectives to Tai Hing Estate where one of the rapes and one of the two murders had been committed. Detectives eventually charged him at 11 pm after further questioning.