Original: On 19 July 2001, Archer was found guilty of perjury and perverting the course of justice at the 1987 trial.
Simplified: On 26 September, 2000 he was charged with perjury and perverting the course of justice (i.e., obstruction of justice) during the 1987 libel trial. On 19 July, 2001 Lord Archer was found guilty of perjury.