The Leo Jackson Jr. murder trial got underway Friday in District Judge Fred M. Hooey’s court and two state witnesses said they could not positively identify Jackson as the man they saw with a knife at the wreck scene where UH's first black homecoming queen was found stabbed The state has asked for death by electric chair if the jury finds Jackson, 26, guilty in the Sep tember 10, 1971, death of Lynn Eusan, former UH black student leader. Patrolman W. J. Spaulding, who investigated the September 10 accident, said Jackson told him Eusan asked him for a ride, then suddenly started screaming and stabbing herself and him. This was shortly before Jackson's car collided with Police Detective E. W. LaFont, Spaulding said. Minutes after the accident Eusan was pronounced dead on arrival at Ben Taub Hospital. Witnesses Clarence Earl and Sherman Hickman said Friday they saw a man in the car at the wreck scene with a knife but they could not identify Jackson as the man Defense lawyer Bob Heath said Friday he would show the jury that another person stabbed Eusan before she got in Jackson's car and Jackson was only trying to rush her to the hospital when he had the wreck with LaFont’s car. Besides being UH’s first black homecoming queen, Eusan was active in UH campus politics. As a freshman in 1966, she helped organize the Committee on Better Race Relations to help better the black situation on campus.