The chaos surrounding a right-of-abode demonstration in which 100 people shook Secretary for Security Regina Ip Lau Suk-yee's car outside the Legco Building made it difficult for authorities to identify those involved, a court heard yesterday. Solicitor Michael Vidler, representing five defendants, said police may have erred in singling out his clients due to poor light during the evening protest on April 24. He said other people besides the abode claimants were in the crowd, including reporters, plainclothes police and legislators. But prosecutor Michael Arthur argued all the defendants were identifiable as the Legco Building's closed-circuit television cameras and police video teams captured the incident. Mr Arthur said that although one defendant, Tsoi Ching-hau, testified in his own defence on Tuesday that he was not involved in the ambush, he failed to notify prosecutors in advance that he planned to raise the issue in court. Hong Kong residents Poon Ping-kuen, 51, Lam Pik-fai, 65, and Hung Siu-yuen, 52, and mainland abode seekers Hui Yau-yim, 30, and Tsoi, 29, each deny one count of obstructing a public place. They are said to have assembled unlawfully either at the car park outside the Legco Building or in Jackson Road, near the Hong Kong Club, on April 24. Poon and Lam have pleaded not guilty to one count of behaving in a disorderly manner in a public place. Poon denies assaulting Detective Senior Inspector Tang Wai-keung outside Legco. Magistrate Patrick Yuen Wai-ming will deliver his verdict next Wednesday.