A Prince George's County Circuit Court jury convicted a 22-year-old Wheaton man yesterday of charges that he willfully caused the deaths of two persons in an automobile crash following a bizarre highway chase last Sept. 27.

The jury convicted John Randall Orange of 2725 Atlanta Dr., Wheaton, of two counts of second-degree murder in the deaths of Michael Ferencz, 41, of Stratford, Conn., and Terry Jean Wright, 18, of Birmingham, Ala. Both died when a car driven by Ferencz plunged over a guardrail at the intersection of Interstate 95 and the Beltway and landed in a gully, according to trial testimony.

Assistant State's Attorney Terrance J. McGann presented evidence that Orange remmed his car into the back of cars driven by Ferencz and a second person during a highspeed chase down I-95.

Orange, also convicted of two counts of assault with intent to maim, could be sentenced to up to 80 years in prison, McGann said. Sentencing is scheduled Sept. 7.

McGann said the incident that led to the deaths began when Orange became involved in analtercation with Ferencz, Wright and two other persons at a gas station on Power Mill Road near Beltsville. Orange then chased Ferencz's car and another one driven by a woman, McGann said.

Orange testified he had been driving south on Rte. 95 at the time of the incident but that he was unable to remember ramming either car or the subsequent crash in which police said his car left the highway at a high rate of speed.