An 18-year-old man accused of fatally stabbing another man in August 2008 has been ordered to stand trial on murder charges, prosecutors said today. At his preliminary hearing Tuesday, a San Mateo County Superior Court judge determined there was enough evidence for Redwood City resident Adrian Sedano to stand trial for the murder of 23-year-old Ramon Buenrostro on Aug. 9, 2008, Chief Deputy District Attorney Steve Wagstaffe said. In addition to one count of murder, the San Mateo County District Attorney’s Office added a second count of engaging in felony criminal activity in furtherance of a street gang. After a competency hearing last month, a judge ruled that Sedano was competent to stand trial, but Sedano’s attorney Vincent O’Malley said today that he doesn’t believe the case should go to trial.”I feel he is not competent to stand trial,” O’Malley said. He said testimony by several experts at the competency hearing backed up the assertion that Sedano has “cognitive impairment and a very severe” case of attention deficit hyperactivity disorder. Sedano faces 27 years to life in prison if convicted.He is accused of stabbing Buenrostro during a fight between two groups of people in front of an apartment complex at 551 Geneva Ave. in Redwood City, Wagstaffe said.Another teen, Christian Lopez, had also initially been charged with murder for hitting Buenrostro with a metal object during that fight, Wagstaffe said.Lopez, however, pleaded no contest on April 7 to felony assault with a deadly weapon and was released on his own recognizance until his sentencing on Feb. 18, Wagstaffe said. He faces a maximum of four years in prison.Sedano is in custody without bail and is scheduled to enter a plea at his superior court arraignment on Dec. 30.