A Redwood City woman has been indicted by a fed eral grand jury in Fresno on a charge of involuntary manslaughter. According to the charge, Marsha Savko, 22, shot her boyfriend to death Oct. 14. She and Dana Lauden slayer, 23, had been camping near Badger Pass in Yosem ite when the incident occurred. Park rangers said the sus pect shot the victim once in the stomach with a 22 cali ber revolver as they hiked on a trail. The victim, who had lived in Redwood City, was a cus tom car designer. He was found dead by a doctor and helicopter crew which had been sent to rescue him. The suspect has contended that the shooting was acci dental. She was released on her own recognizance by Fresno authorities, pending arraignment in U.S. District Court in that city on Dec. 23.