Police surveillance officer, from a distance of about 15 feet, watches client serve two customers crack cocaine and receive money in return. During a third delivery, client is accused of acting as lookout for accomplice. Alleged activity included looking up and down street, stating "it's clear", and directing buyer to his accomplice. Surveillance officer radios enforcement team and that buyer, seller and client are arrested. Seller found with money; buyer found with rock. Client facing Class X sentencing (6-30 years in prison, no probation). After one-day trial, client acquitted of all charges based on impeachment and lack of credibility of police officers.