Prosecutors prepare to wrap up their case this week with FBI laboratory evidence they hope will show Timothy McVeigh used a fertilizer truck bomb to destroy the Oklahoma City Federal Building. FBI chemist Steven Burmeister is expected to tell jurors that he found explosive residue on the T-shirt and faded black jeans McVeigh was wearing when he was arrested 90 minutes after the April '95 blast. A Justice Department report last month criticized parts of the FBI crime lab. The report said a lab supervisor had decided a 4,000-pound ammonium nitrate fuel oil bomb was used at Oklahoma City, based on alleged ingredient purchases by the defendants rather than scientific evidence. Prosecutors removed four FBI agents criticized for their lab work from their list of witnesses. It was unknown whether U.S. District Judge Richard Matsch will allow Jones to pursue the lab's problems during his defense.