A prosecution witness at the Immigration Tower murder-arson trial received a little help from the defence yesterday when asked to demonstrate how a lighter was tucked into an abode-seeker's waistband. Immigration assistant Chan Shu-leung did not have a lighter nor did prosecutor Arthur Luk Yee-shun, who tried to offer a highlighter pen instead. Barrister John Hagon, one of the seven defence counsel, stood up and took a plastic lighter from his trouser pocket and a clerk handed it to the witness. His quick response brought a moment's laughter to the proceedings. Mr Chan was testifying at the trial of Sze Kwan-lung, 24, Pang Hon-kwan, 40, Fu Mo, 38, Lam Hing-luen, 27, brothers Yeung Yee-ping, 29, and Yeung Yee-yim, 38, and Chau Hung-chuen, 30. The right-of-abode claimants deny murdering fellow claimant Lam Siu-sing, 26, and senior immigration officer Leung Kam-kwong, 42, who died on August 11 last year from injuries received in the August 2 Immigration Tower blaze, which broke out in Room 1301. The accused also deny arson. Mr Chan was one of the 120 immigration officers on standby to remove a group of 23 abode-seekers. Prosecutors allege the defendants brought along bottles of thinner and lighters to set people in the office on fire. 'I saw a lighter tucked in [Fu's] right waistband and he had uncapped a water bottle by his side and sniffed at it,' Mr Chan told the Court of First Instance. 'After sniffing at it, he put on an expression of having smelt a foul odour, then he capped the bottle again.' The trial before Mr Justice Thomas Gall continues.