Source: Associated Press Copyright: 1998 Associated Press. Pubdate: 2 Nov 98 Author: Mary Neubauer-The Associated Press Laws: The state argues it's necessary to protect officer's safety and to preserve evidence. Des Moines, Iowa Patrick Knowles knew he was speeding that day. Frustrated that his old car was sputtering,he had stomped on the gas pedal to keep the engine from dying. When a policeman drove by and quickly turned around, Knowles knew he probably would be pulled over and given a speeding ticket. He did not expect the officer to tell him he needed to search his car. But on March 6, 1996, when Newton officer Ronald Cook did search Knowles' car without his permission - which is legal under Iowa statutes - he found marijuana and a pipe under the front passenger seat. Knowles said a friend had left it, but he was liable because it was in his car. Tuesday, the U.S. Supreme Court will hear Knowles' argument that the search violated the U.S. Constitution's protection against unreasonable searches and that the marijuana should not be used as evidence. "There is an overwhelming privacy issue involved," said his lawyer, Maria Ruhtenberg argues that officers must have some suspicion of illegal activity to justify a search with only a citation. At Knowles' trial, Cook testified that he did not suspect Knowles of criminal activity. A state trial judge ruled against Knowles' argument that the marijuana should not be used as evidence. Knowles was convicted of possession of marijuana and keeping marijuana in his car and sentenced to 90 days in jail. In October 1997, the Iowa Supreme Court upheld his conviction in a 5-4 decision. The case has drawn widespread interest, with the American Civil Liberties Union and the National Association of Criminal Defense Lawyers filing arguments in support of Knowles and the National Association of Police Organizations backing Iowa. - --- Checked-by: Pat Dolan