THREE more defendants in Hong Kong's longest-running criminal case have been acquitted of murder by a jury that has been sitting since January last year. Out of the 14 originally charged with the murder of 24 northern Vietnamese in the Sek Kong arson case, there are now only five defendants left on trial. Yesterday, Mr Justice Gall directed the jury to acquit Pham Phu Toan. Earlier, he directed them to acquit Le Van Rung and Tran Van Sang. The three pleaded guilty to the second charge of rioting and will be sentenced at the end of the trial. All defendants have denied murdering fellow inmates at Sek Kong detention centre on February 3, 1992.